Table of Contents. Distribution of Lucifer faxoni (Crustacea: Decapoda: Sergestidae) in neritic water off the Texas Coast, with a note on the occurrence of Lucifer typus / Donald E. Harper, Jr. (p. 1-16) -- Use of dorsal carinal spines to differentiate between postlarvae of brown shrimp, Penaeus aztecus Ives, and white shrimp, P. setiferus (Linnaeus) / Gilbert Zamora and Lee Trent (p. 17-20) -- Cyclic and current structures in a Serpulid reef / E. William Behrens (p. 21-28) -- A study of the geochemistry of vitamin B12 / Larry G. Maurer and P. L. Parker (p. 29-42) -- The production of carbon dioxide by Rangia cuneata / Robert J. Beyers and Robert W. Warwick (p. 43-50) -- A revision of the genus Hoplunnis Kaup (Apodes, Muraenescoidae), with...