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is probable that these floating scolices observed by Gaiger and Hall have
been overlooked on account of their being drained away along with the serous
fluid of the cyst when it was broken. As remarked by Hall, the heads separate
from the bladder wall with extraordinary ease. The scolices are arranged on
the bladder wall in groups but their number in each group varies. One out-
standing feature of the cyst, which has not been observed by any previous
worker, is that the scolices are present not only on the inner surface of the
bladder wall, but are also noticed on its outer surface. This phenomenon,
which is a result of evagination of the scolices, has been observed in the case of
Cœnurus of M. multiceps and appears from the present example to be also true
of M. gaigeri. Two large scolices measure 0.435 × 0.49 mm. and 0.415 × 0.5
mm. respectively. The rostellum is poorly developed and is armed with a
double crown of 28 hooks. The large hooks measure 0.141-0.148 mm.
in length; the blade is slightly curved, the handle is nearly straight with
a dorsal notch and the guard in lateral view is cordiform. The small hooks
measure 0.098-0.109 mm. in length, have a strongly curved blade and the
handle is rather long and straight, tapering to a blunt point. The guard has
a median ventral depression, but it is not actually bifid as in the case of M.
serialis.
Dictyocaulus filaria—This species is well represented in ovines in this
country, but its occurrence in bovines was unknown until the present record
by the writer. Sometime ago specimens from the bronchi of a buffalo from
Peshawar were received at this Institue through the courtesy of the Veterinary
Investigation Officer, North-West Frontier Province. These on examination
proved to be Dictyocaulus filaria. Cases are on record of the occurrence of
this parasite in buffaloes in other countries, but its existence in this host was
so far unknown in this country. The specimens at the disposal of the writer
fall within the range of variations recorded for this parasite except that in one
case the male has spicules which measure 0.58 mm. in length.
Parafilaria bovicola—Through the courtesy of the Veterinary Investiga-
tion Officer, Sind, an opportunity was afforded f or the examination of two
worms recovered from hæmorrhagic nodules of cattle in Karachi. Unfortu-
nately both the worms are females and are not mature. The worms
undoubtedly belong to the genus Parafilaria Yorke and Maplestone, 1926.
So far only two species have been assigned to this genus, viz. P. multipapillosa
(Condamine and Drouilly, 1878) and P. bovicola Tubangui, 1934. On compari-
son of the specimens at my disposal with the above two species, it is found that
they are more closely allied to P. bovicola than to P. multipapillosa, particu-
larly in respect of the ornamentations at the anterior end which are in the form
of ' transverse, cuticular ridges, interrupted at irregular intervals ' instead of
' numerous elliptical and circular papillæ.' According to Tubangui [1934]
another point of difference between the species of this genus is the size of the
eggs and the embryos contained in them. Unfortunately both the specimens
at my disposal being immature, this feature remains uncompared. The speci-
mens from Karachi, therefore, have been tentatively determined as
Parafilaria bovicola. Future opportunity will be utilized to supply a complete