A NEW GENUS AND SPECIES OF LOBSTER (DECAPODA, NEPHROPIDAE) FROM THE CARIBBEAN SEA BY RAYMOND B. MANNING Smithsonian Institution, Washington, D.C., U.S.A. The nephropid lobster described herein was found in the course of examining several collections of crustaceans sent to the Division of Crustacea, Smithsonian Institution for identification by Harvey R. Bullis, Jr., of the U. S. Fish and Wild- life Service. A comparison of material of this lobster with other nephropids in the collection of the Division of Crustacea showed that it represents not only an undescribed species but also a new genus. L. B. Holthuis has brought to my attention the fact that the family name for these lobsters, Nephropsidae, as used until now, is incorrectly spelled. The name is derived from the type-genus, Nephrop.r, and should be spelled Nephropidae. I would like to thank Harvey R. Bullis, Jr. for making this material available for study and L. B. Holthuis and Fenner A. Chace, Jr., for their comments and advice. Plate I was drawn by Mrs. Carolyn Gast and textfigure 1 was drawn by my wife Lilly. Nephropides new genus Definition. - Rostrum narrow, extending beyond antennular and antennal peduncles, with 2 or 3 lateral spines; eyes small, pigmented; second segment of antennular peduncle shorter than either first or third segments; antennal scale absent; carapace covered with low, blunt tubercles; longitudinal median groove of carapace well-formed, extending onto rostrum; cervical groove prominent; cara- pace lacking longitudinal branchial carinae; abdominal somites covered with flat tubercles, each somite with anterior transverse groove but lacking longitudinal median carina; pleuron of second abdominal somite subrectangular, pleura of third to sixth somites triangular; telson subrectangular, longer than broad; chelae large, slender, subequal, carinate, ornamented with numerous spinules, dactyli clothed in setae. - Type-species. Nephropide.r caribaeus new species. - Etymology. Ne phro p.r and -ides, Greek, descendant of, alluding to relation- ship to Nephrops. Gender. - Masculine. 304 - Discussion. Nephropide.r most closely resembles Nephropsis Wood-Mason, Nephrops Leach, and Eune phro p.r Smith. It agrees with Nephropsis in lacking an antennal scale, but differs in that the cornea is pigmented, the longitudinal branchial carinae of the carapace are absent, and the pleura of the second abdominal somite are rectangular rather than triangular. The shape of the pleuron of the second abdominal somite is similar in Nephro- pide.r, Nephrop.r, and Eunephrop.r, and these three genera also share the large, carinate chelae. Nephropide.r, however, differs from both in having small eyes and in lacking an antennal scale. The body sculpture of Nephropide.r, which resembles that of Neophoberu.r, is much more ornate than in any of the species of N Nephrops or Eunephrop.r. The slender toothed chelae of Neophoberus Glaessner and Thauma.rtochele.r Wood-Mason will immediately distinguish these genera from Nephropide.r. In Neophoberus the eyes are unpigmented and in T hallmastocheles the eyes are entirely absent. Nephropides caribaeus new species (text fig. 1, pl. 1) Holotype. - 1 a, 175 mm (total length); Nicaragua, 12°25'N 82ol5'W; depth 546-582 m; "Oregon" Sta. 3576; 23 May 1962; USNM 113741. .