EXHIBIT 23.4

             [LETTERHEAD OF NETHERLAND, SEWELL & ASSOCIATES, INC.]

               CONSENT OF NETHERLAND, SEWELL & ASSOCIATES, INC.

     We hereby consent to the incorporation by reference in the Joint Proxy
Statement of Southern Mineral Corporation, a Nevada corporation (the "Company")
and PetroCorp. Incorporated, a Texas Corporation and the Registration Statement
of Form S-4 of PetroCorp. Incorporated of the references to this firm and to
its reports listed below for the Company's estimated domestic and Ecuador proved
reserves contained therein.

1.   Audit of domestic proved reserves estimates as of January 1, 1997 dated
     February 25, 1997.
2.   Report of domestic proved reserves estimates as of January 1, 1998 dated
     February 16, 1998.
3.   Report of domestic proved reserves estimates as of January 1, 1999 dated
     February 11, 1999.
4.   Report of domestic and Ecuador proved reserves as of January 1, 2000 dated
     January 19, 2000.

                                          NETHERLAND, SEWELL & ASSOCIATES, INC.

                                             By: /s/ Danny D. Simmons
                                                 ------------------------------
                                                 Danny D. Simmons
                                                 Senior Vice President

Houston, Texas
January 26, 2001