Table of Contents

Exhibit31.2

CERTIFICATION

I, DanielR. McAuliffe, Jr., certify that:

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| 1.  | I havereviewed this quarterly report on Form 10-Q of Smith Barney PotomacFutures Fund L.P. (the ‘‘registrant’’); |

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| 2.  | Based on my knowledge, this report does notcontain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleadingwith respect to the period covered by this report; |

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| 3.  | Based on my knowledge, the financialstatements, and other financial information included in this report,fairly present in all material respects the financial condition,results of operations and cash flows of the registrant as of, and for,the periods presented in this report; |

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| 4.  | Theregistrant's other certifying officer and I are responsible forestablishing and maintaining disclosure controls and procedures (asdefined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internalcontrol over financial reporting (as defined in Exchange Act Rules13a-15(f) and 15d-15(f)) for the registrant and have: |

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| a)  | designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material informationrelating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly duringthe period in which this report is being prepared; |

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| b)  | designed such internal controlover financial reporting, or caused such internal control overfinancial reporting to be designed under our supervision, to providereasonable assurance regarding the reliability of financial reportingand the preparation of financial statements for external purposes inaccordance with generally accepted accounting principles; |

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| c)  | evaluated the effectiveness of theregistrant's disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by thisreport based on such evaluation; and |

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| d)  | disclosed in this report any change inthe registrant's internal control over financial reporting thatoccurred during the registrant's most recent fiscal quarter thathas materially affected, or is reasonably likely to materially affect,the registrant's internal control over financial reporting;and |

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| 5.  | The registrant's othercertifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to theregistrant's auditors and the audit committee of theregistrant's board of directors (or persons performing theequivalent functions): |

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| a)  | allsignificant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which arereasonably likely to adversely affect the registrant's ability torecord, process, summarize and report financial information; and |

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| b)  | any fraud, whether or not material,that involves management or other employees who have a significant rolein the registrant's internal control over financialreporting. |

Date: August 14, 2006

|  | /s/ Daniel R. McAuliffe,Jr.                        Daniel R. McAuliffe,Jr. Citigroup Managed Futures LLC Chief Financial Officer andDirector |
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