PROC. BIOL. SOC. WASH. 93(3), 1980, pp. 563-572 A NEW SPECIES OF PONTOPHILUS (CRUSTACEA: NATANTIA: CRANGONIDAE) FROM THE GULF OF MEXICO AND THE WESTERN ATLANTIC^ Mike Dardeau Abstract. — Pontophiliis gorei, a new species of caridean shrimp, is de-scribed from the Gulf of Mexico and the western Atlantic. It differs from other Gulf of Mexico species in lacking an exopod on the first pereopod and in the form of the rostrum. The synonymy oi Philocheras with Pontophilus is discussed. In a review of the genus Pontophilus in the Gulf of Mexico, Pequegnat (1970) listed three species, P. brevirostris Smith, 1881, P. gracilis Smith, 1882 and P. abyssi Smith, 1884. Specimens discussed as P. abyssi later proved to be P. talismani Crosnier and Forest, 1973 (pers. comm., L. H. Pequegnat). Examination of specimens collected during "Project Hour-glass," a biological sampling program on the continental shelf off central western Florida (see Joyce and Williams, 1969), revealed that a fourth species of Pontophilus, described herein, occurs in the Gulf of Mexico. Pontophilus gorei, new species Figs. 1-4 Material examined. — Specimens are deposited in invertebrate collections at the U.S. National Museum of Natural History, Washington, D.C. (USNM); Rijksmuseum van Natuurlijke Historic, Leiden, Netherlands (RMNH); Florida Department of Natural Resources Marine Research Lab-oratory, St. Petersburg, Florida (FSBC I); Texas A&M University, College Station, Texas (TAMU); Indian River Coastal Zone Study Reference Mu-seum, Fort Pierce, Florida, (IRCZS); and Marine Environmental Sciences Consortium, Dauphin Island, Alabama (MESC). The abbreviation cl refers to carapace length, measured in mm from the level of the posterior margin of the orbits to the posterior margin of the carapace. Holotype.—l ovig. 9 , cl 2.5; 26°24'N, 83°22'W, 55 m; 6 Aug. 1966, trawl; USNM 172417. Allotype.— \ 6, cl 1.9; 27°37'N, 83°58'W, 55 m; 2 Aug. 1966, trawl; USNM 172418. Paratypes. — West coast of Florida, off Tampa Bay: 1 c^, cl 1.8; 2 9 , cl 1.8, 1.7; 3 juv., cl 0.6-1.2; 27°37'N, 84°13'W, 73 m; 2 Dec. 1966, dredge; USNM 172419. 1 d, cl 1.8; 1 ovig. 9, cl 2.1; 27°37'N, 84°13'W, 73 m; 2 ' Contribution No. 029 of the Marine Environmental Sciences Consortium, P.O. Box 386, Dauphin Island, Alabama 36528.