308 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



Tribe PORCELLANIDEA. 

 Family POECELLAmD^. 



Genus PORCELLANA Lamarck. 



KEY TO THE WEST AFRICAN SPECIES OF THE GENUS PORCELLANA. 



A. Carapace smooth speciosa. 



A'. Carapace marked with prominent lines. 



B. Front little inclined and with straight border mattosi. 



B'. Front inflected. Hands covered above with small granules disposed in 

 groups bella. 



PORCELLANA SPECIOSA Dana. 



Porcellana speciosa Dana, Cruet. U. S. Expl. Exped., I, 1852, p. 417; 1855, pi. 

 XXVI, fig. 8. 



Eange. — Pacific Ocean: Drummond Island, Kingsmills Group 5 

 Wakes Island; Mangsi Islands, Balabac Straits; Earaka, Paumotu 

 Archipelago. West Africa. 



West African localities. — Princes Island (Osorio) ; St. Thomas Island 

 (Osorio). 



PORCELLANA MATTOSI Osorio. 

 Porcellana mattosi OsORiO, Jor. Sci. Lisboa, XI, 1887, p. 229. 



West African locality. — Loanda (Osorio). 



PORCELLANA BELLA Osorio. 



Porcellana hella OsoRio, Jor. Sci. Lisboa, XI, 1887, p. 229. 

 West African locality. — Loanda (Osorio). 



Tribe THALASSINIDEA. 

 Family CALLIANASSID^. 



KEY TO THE WEST AFRICAN GENERA OP THE FAMILY CALLIANASSIDiE. 



A. Second pair of feet minutely chelate » Callianassa. 



A'. Second pair of feet not chelate Upogebia. 



Genus CALLIANASSA Leach. 



KEY TO THE WEST AFRICAN SPECIES OF THE GENUS CALLIANASSA. 



A. Rostrum three-spiued tarnerana. 



A'. Rostrum five-spiued diademata. 



CALLIANASSA TURNERANA White. 



Callianassa turnerana White, Proc. Zool. Soc. London, 1861, p. 42, pi. vi. — 

 A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. Paris, VI, 1870, p. 89. 



West Africa. — Kamerun (White, A. Milne-Edwards). 



