Document:

Exhibit 10.7

                             THIRD LEASE AMENDMENT

  STATE OF TEXAS
  COUNTY OF DALLAS

       THIS THIRD LEASE AMENDMENT  is entered into as  of the 1st day  of
  December, 1994 (the  "Amendment Date"),  by and  between WESTERN  ATLAS
  INTERNATIONAL,  INC.,  hereinafter  referred  to  as  "Landlord",   and
  CARRINGION LABORATORIES, INC., hereinafter referred to as "Tenant".

                           W I T N E S S E T H:

       WHEREAS, by a lease dated August 30, 1991 (the "Lease Agreement"),
  Landlord leased to Tenant the Leased  Premises described in such  Lease
  Agreement; and

       WHEREAS,  the  Lease  Agreement  was  amended  by  a  First  Lease
  Amendment, dated as of April 16,  1992 (the "First Amendment"), by  and
  between Landlord and Tenant; and

       WHEREAS, the  Lease  Agreement  was  amended  by  a  Second  Lease
  Amendment, dated as of September 23, 1993 (the "Second Amendment"),  by
  and between Landlord and Tenant; and

       WHEREAS,  the  parties here  to desire  to further amend the Lease
  Agreement as hereinafter provided for.

       NOW, THEREFORE, for and in consideration of the premises and other
  good and valuable consideration the receipt  and adequacy  of which are
  hereby  acknowledged,  the  parties hereto hereby  agree that the  said
  Lease Agreement is amended and modified as follows:

  1.   Lease Term.  Subparagraph  1(h) of  the  Lease Agreement is hereby
  deleted  in  its  entirety  and  the following is  substituted in  lieu
  thereof:

       (h) "Lease Term": The period commencing on the Amendment
            Date and ending on January 31, 2000,  unless sooner
            terminated as provided in the Lease Agreement.

  2.   Minimum Rent.  Subparagraph 1(k) of the Lease Agreement is here in
  its entirety and the following is substituted lieu thereof:
<PAGE>
       (k) "Minimum Rent"  shall  mean  the  amount per monthly
            rental per  month specified below commencing on the
            Amendment Date  and  continuing  on  or  before the
            first day of each month of the Lease Term hereof:

                                       Monthly     Annual
                    Months             Rental     $/Sq. Ft.
                    ------             ------     ---------
                        Dec. 1994      $  -0-           -0-
                        Jan. 1995      $  -0-           -0-
            Feb. 1995 - Jan. 1996      $21,631      $  10.75
            Feb. 1996 - Jan. 1997      $21,631      $  10.75
            Feb. 1997 - Jan. 1998      $22,637      $  11.25
            Feb. 1998 - Jan. 1999      $23,643      $  11.75
            Feb. 1999 - Jan. 2000      $23,643      $  11.75

  3.    Overtime HVAC Charge. The phrase "$50.00 per hour" in subparagraph
  1(m) of the Lease Agreement is hereby amended to read as follows:

       "$10.00 per hour so long as the building central plant is
       being operated for another tenant, of the building and if
       such central plant is not being operated for another such
       tenant, $25.00 per hour."

  4. Supplemental After-Hours Air Conditioning System. Paragraph 5 of the
  Lease Agreement is hereby amended by  adding the following sentence  to
  the end of such Paragraph 5:

       "Landlord  shall  on  or  prior  to February 1,  1995, at
       Landlord's sole cost, install a  supplemental after-hours
       air conditioning system  for approximately  1,200  square
       feet  of the Leased Premises, in which  case Tenant shall
       be responsible for  metered  electrical usage of such air
       conditioning system)"

  5. Base  Year.  The Base  Year  defined in  Paragraph  8 of  the  Lease
  Agreement is  hereby  amended to  delete  "1992" (which  reference  was
  amended by the Second Lease Amendment to "1993") and substitute in lieu
  thereof "1994".
<PAGE>
  6. Audit of  Operating Costs.  Paragraph 8  of the  Lease Agreement  is
  hereby amended by adding the following subparagraph to the end of  such
  Paragraph 8:

       "Tenant  shall have  the right  to  examine and  audit  Landlord's
       books  and  records  pertaining  to  Landlord's  determination  of
       Tenant's proportionate share of  Excess Operating Costs by  giving
       Landlord written notice within  one hundred and twenty (120)  days
       after  Tenant's  receipt of  Landlord's  statement  to  Tenant  of
       Tenant's proportionate share of Excess Operating Expenses for  any
       calendar year pursuant  to the provisions  of Paragraph B  hereof.
       Any such audit  shall be conducted within  one hundred and  twenty
       (120)  days  from  the  date  of  Tenant's  notice  and  shall  be
       conducted during normal business hours in such a manner as not  to
       interfere with  Landlord's  operations. In  the event  such  audit
       reasonably  concludes that  Landlord  has  overstated  the  actual
       Tenant's proportionate  share of  Excess Operating  Costs by  more
       than  five percent  (5%)  in  any calendar  year,  Landlord  shall
       reimburse Tenant for the reasonable cost of such audit."

  7. Cancellation  Option.  Paragraph 1  of  Rider  No, 1  to  the  Lease
  Agreement is hereby deleted in its entirety.

  8. Option to Extend. The references to "three (3) years" in Rider No. 2
  to the Lease Agreement are hereby amended to be "five (5) years".

       The  Lease Agreement  as hereby  amended  is hereby  ratified  and
  confirmed by the parties hereto as being in full force and effect.

       This Third Lease Amendment shall be binding on the parties  hereto
  and their respective successors and  assigns; subject, however, to  the
  terms of the Lease Agreement as hereby amended.

       EXECUTED as of the day first hereinabove set out.

  LANDLORD                                 TENANT

  WESTERN ATLAS INTERNATIONAL. INC.        CARRINGTON LABORATORIES, INC.

  By: /s/                                  By: /s/
      -----------------------------        -----------------------------
  Name: ___________________________        Name: _______________________

  Title: __________________________        Title: ______________________Exhibit 10.08

                          FOURTH LEASE AGREEMENT

  STATE OF TEXAS

  COUNTY OF DALLAS

        This  Fourth Less.  Amendment  (this  "Amendment")  is  made  and
  entered  into by  and  WESTERN ATLAS  INTERNATIONAL, INC.,  a  Delaware
  Corporation  "Landlord". And  CARRINGTON  LABORATORIES, INC.,  a  Texas
  corporation  ("Tenant"),   effective  as  of   August  31,  1999   (the
  "Effective  Date")  Capitalized Terms  used  herein and  not  otherwise
  defined shall  have the meanings  assigned to such  terms In the  Lease
  (hereinafter defined).

                                WITNESSETH:

        WHEREAS. Landlord  and  Tenant entered  into that  certain  Lease
  Agreement dated  effective August 30, 1991  (as amended, the  "Lease"),
  pursuant to which Landlord agreed to lease to Tenant and Tenant  agreed
  to Lease from Landlord  approximately 21.733 square feet of space  (the
  "Premises") In  the building located at  1300 East Rochette  Boulevard,
  Irving, Texas (the "Building"; and

        WHEREAS the Lease  was previously amended  by that certain  First
  Lease  Amendment between  Landlord  and Tenant  dated April  16,  1992,
  Increasing  the area  of the  Premises to  approximately 23,284  square
  feet of space; and

        WHEREAS, the Lease was previously amended by that certain  Second
  Lease Amendment between  Landlord and Tenant dated September 23,  1993,
  increasing  the areas of  the Premises to  approximately 24,146  square
  feet of space: and

        WHEREAS, the Lease was previously  amended by that Certain  Third
  Lease  Amendment between Landlord  and Tenant dated  December 1,  1994,
  extending  the,  term of  the  Lease to  January  31, 2000  and  making
  certain other changes to the original Lease;

        WHEREAS, the  Lease currently contains  an option  to extend  the
  term for  a period of five  (5) calendar years  from February 1,  2000,
  though January 31, 2005 which was recently exercised by Tenant and

        WHEREAS, Landlord and  Tenant have agreed to  amend the Lease  to
  reduce the  length of the renewal term to  eighteen (18) months and  to
  set the amount of Minimum Rent applicable during the renewal term, and

        WHEREA,  Landlord and Tenant have  agreed to make certain  other,
  changes in the terms and provisions of the Lease as hereafter  provided
  and desire to execute  this Amendment to set forth in writing all  such
  changes;
<PAGE>
        NOW, THEREFORE KNOW ALL MEN BY THESE PRESENTS:

        THAT, for and  in consideration of  the premises and  of Ten  and
  No/100 Dollars ($10.00) and other good and valuable consideration  paid
  by Tenant to Landlord,  the receipt and sufficiency of which are hereby
  acknowledged,  Landlord end  tenant  do hereby  covenant and  agree  as
  follow.:

        1.  Notwithstanding anything contained in the Lease or  Tenant's.
  prior election  to extend the Lease Term for  five (5) years, the  Term
  of the  Lease is hereby amended  so that the Lease  Term shall end  on,
  July  31. 2001.   Landlord and Tenant  hereby agree  that Tenant  Shall
  have no  further right to extend the Lease  Term beyond July 31,  2001,
  and Tenant hereby waives any and all such rights.

        2.  Minimum Rent for the Premises during period from February  1,
  2000, through July 31, 2001, shall be Forty Thousand Two Hundred  Forty
  and 33/100 Dollars per month.

        3.  Commencing February 1, 2000, there shall no longer be a "Base
  Year" under  the Lease and  Tenant shall no  longer be responsible  for
  payment of  Operating Costs.   Accordingly, Section 8  of the Lease  is
  hereby  deleted in  its entirety  and the  Lease is  hereby amended  to
  delete all reference therein to a "Base Year" or "Operating Costs."

        4.  Section 30  of the  Lease is hereby  amended by deleting  the
  phrase 15O%  of the monthly rent contained  in the fifth line,  thereof
  and replacing it with the phrase "300% of the monthly rent."

        5.  During the remainder of the Term, Tenant agrees to use  "best
  management  practices'   with  respect  to  the  hazardous  waste   and
  hazardous materials  that it handles in the  Premises, as such term  is
  used and  prescribed by law U.S.  Environmental Protection Agency,  the
  Texas  Natural Resources  Conservation  Commission, the  National  Fire
  Protection  Association and  the U.S.  Occupational Safety  and  Health
  Administration

        As hereby expressly amended, the Lease is ratified and  confirmed
  to be in full force and effect.

        IN WITNESS  WHEREOF,  the parties  have executed  this  Amendment
  effective as of the date first set forth above.

                                       WESTERN ATLAS INTERNATIONAL, INC.

                                       By: /s/
                                           -----------------------------
                                       Name:   C.S. Finley
                                       Title: Vice Presldent

                                       CARRINGTON LABORATORIES, INC.

                                       By: /s/
                                           -----------------------------
                                       Name:  Carlon E. Turner, Ph. D.
                                       Title: President & Chief
                                              Executive Officer

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