NO. 1199. CRUSTACEANS OF WEST AFRICA— RATRBUN. 279 



simplex Dana), which can be told most readily by its narrower cara- 

 pace, with sides slightly converging- posteriorly, and by the entire lower 

 extremity of the meri of the last pair of feet. There is a specimen of 

 P. maurus in the U. S. National Museum from Terceira, Azores, col- 

 lected by William Trelease. It is also known from Algiers (type 

 locality); Oran (Milne-Edwards); Madeira (Stimpson); Eio Janeiro 

 (Dana, Heller). 



It is possible that Orapsus simplex Herklots, from Boutry, Guinea, 

 is a synonym of Facliygrapsus maurus Lucas. 



Genus PLANES Leach. 



PLANES MINUTUS (Linnaeus). 



Cancer minutus Linn.eus, Sys. Nat., lOth ed., 1, 1758, p. 625. 



Planes clypeatus Bowdich, Excursions in Madeira and Porfo Santo, 1825, p. 15, 



pi. XII, figs. 2a, 2b. 

 Planes minufm White, List Crust. Brit. Mus., 1847, p. 42. 



Range. — In all tropical and temperate seas. 



West African localities. — Canary Islands (Miers); Eio Gambia 

 (Kingsley). 



Genus PLATYCHIROGRAPSUS de Man. 



PLATYCHIROGRAPSUS SPECTABILIS de Man. 



Platychirograpsus spectabilis de Man, Zool. An/.., No. 506, 1896, p. 292; Jahrb.^ 



Hamburg. Wissen. Anst., XII, 1896, p. 97, pi. ii, figs. 4, 4 a, b, cl; pi. in, fig. 4^. 

 Aspidograpsus tyjncus Kr0yer, manuscript (Copenhagen Museum). 



Range. — Mexico ; West Africa. One specimen was received from the 

 Mexican Commission at the World's Columbian Exposition, 1893 

 (U.S.N".M.). Bay of Mexico, one male (Copenhagen Mus.). A claw of 

 this rare species was discovered by the writer among a collection of 

 deformed lobster claws in the museum at Halifax, Nova Scotia; its 

 origin is unknown. 



West African locality. — Gabun (de Man). 



Genus SESARMA Say. 

 Subgenus HOLOMETOPUS Milne-Edwards. 



KEY TO THE WEST AFRICAN SPECIES OP THE SUBGENUS HOLOMETOPUS. 



A. Upper margin of front concave and deeply fonr-lobed roberti. 



A'. Upper margin of front straight and nearly undivided elegans. 



SESARMA (HOLOMETOPUS) ROBERTI Milne-Edwards. 



Sesarma roberti Milne-Ebwards, Ann. Sci. Nat. (3), XX, 1853, p. 182 [148]. 

 Sesarma americana PococK, Ann. Mag. Nat. Hist. (6), III, 1889, p. 7. Not S. 



americana Saussure. 

 Sesarma bromeliarum Eathbun, Proc. U. S. Nat. Mus., XIX, 1896, p. 143. 



Range. — West Indies: Haiti; Jamaica; Puerto Eico (Cat. No. 4801, 

 Berlin Mus.); Laiou, Dominica (Pocock) ; Martinique (Paris Mus.) ; St. 

 Lucia. West Africa. 



West African locality. — Goree, Senegal (Milne- Edwards) 



