NO. 1199. CRUSTACEANS OF WEST AFBICA—BATHBUN. 289 



Genus EPIXANTHUS Heller. 



EPIXANTHUS HELLERII A.Milne-Edwards. 



Epixanthus liellerii A. Milne-Edwards, Ann. Soc. Entoni. France (4), VII, 1867, 



p. 278. 

 Ozius corrugatus OsoRio, Jor. Sci. Lisboa, XI, 1887, p. 224; (2), 1, 1889, p. 131. 



West African localities. — Senegal (A. Milne-Edwards); Gabun (A. 

 Milne-Edwards); St. Thomas Island, at logo-logo, S. Joao dos Angu- 

 lares and Praia das Conchas (Osorio); Angola (Osorio). 



Family PORTUNIDja. 



KEY TO THE WEST AFRICAN GENERA OF THE FAMILY PORTUNID^. 



A. Antero-lateral teeth nine. 

 B. Flagelluni of antenna entering orbit. 



C. Abdomen of male triangular Portuniis. 



C. Abdomen of male an inverted T Callinectes. 



B'. Basal joint of antenna enlarged and almost excluding the antenna from the 



orbit Cliarybdella. 



A'. Antero-lateral teeth less than nine. 



B. Carapace wide, subquadrilateral. Front and orbits occupying almost entire 



width of carapace Thalamita. 



B'. Carapace narrow ; frontal and antero-lateral borders forming a regular curve. 

 Lateral teeth five. ' ." Liocarcinus. 



Genus PORTUNUS Fabricius. 

 ^= Neptitnus De Haan. 



KEY TO THE WEST AFRICAN SPECIES OF THE GENUS PORTUNUS. 



A. Posterior border of the arm with two spines near the wrist validus. 



A'. Posterior border of the arm with one spine at the wrist. 

 B. Carapace rough with series of granulations. Hand with three spines . . hastatus. 

 B'. Carapace almost smooth. 



C. Hand with two spines edwardsL 



C Hand with one spine pallidus. 



PORTUNUS VALIDUS Herklots. 



Portunus (Posidon) validus Herklots, Addit. Faun. Africse Occ, 1851, p. 4, pi. i, 



fig. 1. 

 Neptunus validus A. Milne-Edwards, Arch. Mus. Hist. Nat., X, 1861, p. 321, pi. 



XXIX, fig. 1. 



West Afi-ican localities. — St. George del Mina, Guinea (Herklots); 

 Benguela (Osorio). 



1 "Lupa spinimosa Learn." is known to me only by the entry of Osorio in Jor. Sci. 

 Lisboa (2), I, 1890, p. 129. 



Proc. N. M. vol. xxii 19 



