FISHERY BULLETIN: VOL. 83, NO. 1 



previous authors who noted that it bears only two; 



1 was convinced at the time that they considered 

 the variably situated third tooth, when located 

 subterminally, an apical instead of a dorsal tooth. 

 The study of the extensive collection available to 

 me for the present project has indicated that this 

 species sometimes (25% of the specimens) bears 

 only two teeth, and occasionally four (3% of the 

 individuals). 



It should be mentioned that the holotype of this 

 species was lost during the Chicago fire of 1871. 



Material. — 73 specimens from 41 lots. 



Eastern Pacific — 12 specimens from 6 lots. 



Costa Rica — 15, USNM, Isla San Lucas, 5 

 January 1930, M. Valerio. 



Panama— Id 19, AHF, Isla Taboga, 4-9 m, 2 

 May 1939. 39, SIO, Isla Taboga, 3 m, 30 March 

 1967, R. Rosenblatt. 19, USNM, Punta Paitilla, 

 intertidal, 1 July 1969, L. G. Abele and J. Gra- 

 ham. 19, USNM, Punta Paitilla, intertidal, 17 

 June 1969, J. Graham. 49, USNM, Punta Pai- 

 tilla, 8 m, 13 April 1972, C. E. Dawson and party 



Western Atlantic — 61 specimens from 34 lots. 



United States— North Carolina: 19, USNM, 

 off Cape Hatteras, 90 m, 17 October 1885, Alba- 

 tross stn 2596. 29 , USNM, off Morehead City, 14 

 July 1913, Fish Hawk. 39, USNM, Boque Sound 

 (off Morehead City), August 1912, Fish Hawk . 19 , 

 USNM, Black Rocks (off New River), 13 m, 8 Au- 

 gust 1949, A. S. Pearse. South Carolina: 19, 

 USNM, mouth of Bulls Creek, 1891, Fish 

 Hawk . 16 , USNM, Charleston Harbor, 14.5 m, 13 

 March 1891, Fish Hawk stn 1659. 19 , USNM, off 

 S end of May River, Calibogue Sound, 18 m, 16 

 January 1891, Fish Hawk stn 1651. Flori- 

 da: 19, USNM, Biscayne Bay, 7 July 1960, B. 

 Petskin. 19 , MCZ, off Key West, J. R. Miller. 16 

 49, USNM, Marco, 2-5.5 m, H. Hemphill. 16, 

 USNM, Punta Rassa, 2 m, February 1884, H. 

 Hemphill. 19, USNM, Charlotte Harbor, March 

 1887, W H. Dall. 26 29, USNM, Sarasota Bay H. 

 Hemphill. 16, USNM, St Martin, 5.5 m, 15 

 January 1902, Fish Hawk stn 7222. 16 39, 

 USNM, off St Martin's Reef, 5 m, G. F Moser 26 , 

 USNM, off NW end St Martin's Reef, 1887, G. R 

 Moser. 19, USNM, Aucilla, 9 m, 6 November 

 1901, Fish Hawk stn 7148. 



Cuba— Id 19, USNM, off Cayo Levisa, 4-5.5 m, 



2 June 1914, Tomas Barrera Exped stn 14. 

 Jamaica— Id, USNM, SE of Great Pedro Bluff, 



27-29 m, 6 July 1970, Pillsbury stn 1223. 



Haiti— 19, AMNH, Port-au-Prince, W Beebe. 



Puerto Rico— 29, USNM, Mayagiiez, 23 m, 20 

 January 1899, Fish Hawk stn 6093. Id 39, 

 USNM, Mayagiiez Harbor, 19-20 January 1899, 

 Fish Hawk . 29 , USNM, off Humacao, 23 m. Fish 

 Hawk. 26 29, USNM, off Isla Culebra, 27 m, 8 

 February 1899, Fish Hawk stn 6093. 



Virgin Islands— St. Thomas: 19 , USNM, 1884, 

 Albatross. 



Mexico — Quintana Roo: Id, USNM, off Isla 

 Mujeres, 29.5 m, 11 June 1962, Oregon stn 

 3638. Id , USNM, SE of Isla Mujeres, 101-275 m, 

 9 September 1967, Gerda stn 880. 19, USNM, 

 Bahia de la Ascension, 17 April 1960, Smith- 

 sonian-Bredin Caribbean Exped stn 85-60. 



Nicaragua — 29, USNM, off NE Nicaragua, 55 

 m, 8 June 1964, Oregon stn 4930. 29 , USNM, off 

 Prinzapolca, 27 m, 28 January 1971, Pillsbury stn 

 1335. 19, USNM, E of Isla del Venado, 24 m, 28 

 January 1971, Pillsbury stn 1330. Id 19 , USNM, 

 SE of Punta de Perlas, 27 m, 28 January 1981, 

 Pillsbury stn 1334. 



Colombia— 19, USNM, Sabanilla, 1884, Alba- 

 tross. 19, USNM, off Tucuracas, 9 m, 30 July 

 1968, Pillsbury stn 778. 



Brazil — Santa Catarina: 19, MP, Anse de 

 Zimbros, 5-0 m, 16 December 1961, Calypso stn 

 148. 



Sicyonia disparri (Burkenroad 1934) 

 Figures 5, 12-17 



Eusicyonia disparri Burkenroad 1934a:83, fig. 27 

 [holotype: 9, YPM 4392, Bahia San Luis Gon- 

 zaga, Baja California Norte, Mexico, 17 May 

 1926, Pawnee]. Burkenroad 1938:80. 

 Anderson and Lindner 1945:315. 



Sicyonia disparri. Brusca 1980:256. 



Vernacular names: rock shrimp (United States); 

 camaron conchiduro, camaron de piedra, 

 cacahuete (Mexico). 



Diagnosis. — Antennal spine absent. Second ab- 

 dominal somite with perpendicular incision on 

 dorsomedian carina. First pereopod armed with 

 short spine on basis and ischium. Postrostral 

 carina bearing three subequal teeth, epigastric 

 one as large, or almost as large, as posterior two 

 teeth. Anteromedian sulcus of first abdominal so- 

 mite clearly distinct to near ventral margin of 

 pleuron; posteroventral extremity of fourth ab- 

 dominal somite markedly angular Petasma with 

 distal projection of dorsolateral lobule curved me- 



16 



