NO. 1199. CRUSTACEANS OF WEST AFRICA— BATHBUN. 281 



Subgenus SARMATIUM Dana. 

 SESARMA (SARMATIUM) CURVATUM Milne-Edwards. 



Sesarma curvata Milne-Edwards, Hist. Nat. Crust., II, 1837, p. 75. 



Sesarma violacea Herklots, Addit. Fauna Afr. Occ, 1851, p. 10, pi. i, fig. 9. — de 



Man, Notes Leyden Mus., II, 1880, p. 31. 

 Metagrapsus curvatus Milne-Edwards, Ann. Sci. Nat. (3), XX, 1853, p. 189 [155]. 

 Sarmatium curvatum KiNGSLEY, Proc. Acad. Nat. Sci. Phila , 1880, p. 212. 



West African loealities. — Senegal (Milne-Edwards); near Boutry, 

 Guinea (Herklots); Boutry and Saccondi (de Man); Ogove (Thallwitz) ; 

 Lobito (Osorio); West Africa (Kin gsley). 



Genus PLAGUSIA Latreille. 



KEY TO THE WEST AFRICAN SPECIES OK THE GENUS PLAGUSIA. 



A. Carapace tuberculate dexwessa. 



A'. Carapace smooth - delaunayi. 



PLAGUSIA DEPRESSA (Fabricius). 



Cancer depressus Fabricius, Sys. Ent., 1775, p. 406. 



Plagnsia depressus Say, Jour. Acad. Nat. Sci. Phila., 1, 1817, p. 100. 



Range. — From Charleston, South Carolina, to Brazil; from the Med- 

 iterranean to St. Helena and South Africa. 



African localities. — Madeira (Osorio); Gape Verde Islands (Osorio) ; 

 St. Vincent, Gape Verde Islands (Miers); Rufisque, Senegal (Hilgen- 

 dorf); Senegambia (Herklots, as P. squamosa)^ Liberia, Saccondi and 

 Acra d'Elmiua (de Man); Beyah River, Ashantee (Benedict); near 

 Boutry, Guinea (Herklots, as P. squamosa) ; St. Thomas Island (Osorio); 

 Angola (Osorio); Natal (Herklots, as P. squamosa). 



PLAGUSIA DELAUNAYI Rochebrune. 



Plagusia delaunayi EochebrunIs, Bull. Soc. Philom., Paris (7), VII, 1883, No. 4, 

 p. 172. 



West African localities. — He aux Ghiens, Albreda; Gambia (Roche- 

 brune). 



Genus PERCNON Gistel.' 



PERCNON PLANISSIMUM (Herbst). 



Cancer planissimus Herbst, Natur. Krabbeu u. Krebse, III, 1804, Pt. 4, p. 3, pi. 



Lix, fig. 3. 

 Leiolophus planissimus Miers, Cat. Crust. New Zealand, 1876. p. 46. 



Range. — West Indian region; Oriental region to Japan and Sand- 

 wich Islands; Clarion Islaud; Cape St. Lucas; Chile; Azores; West 

 coast of Sj)ain and Portugal; West and South Africa. 



African localities. — Madeira (Bruhe, Dana, Miers); Canaries (Brulle); 

 Praia das Conchas, St. Thomas Islaud (Osorio); Ascension Island 

 (Miers); Cape of Good Hope (Ortmaun). 



' Percnon Gistel, Naturgesch'ichte des Thierreichs, Stuttgart, 1848, p. viii, substi- 

 tuted for Acanthopus de Haan, preoccupied. 



