310 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



Family PALINUEID^. 



KEY TO THE WEST AFRICAN GENEKA OF THE FAMILY TALINURIDiE. 



A. Upper part of antennular segment almost horizontal, broad, so that the bases of 

 the outer antennte are distant from each other Panulirus. 



A'. Upper part of antennular segment oblique, rather narrow, so that the bases of the 

 outer antenuai are near together . . : PaUnostus. 



Genus PANULIRUS White. 



KEY TO THE WEST AFRICAN SPECIES OP THE GENUS PANULIRUS. 



A. Exognath of outer maxillipeds without palpus and reaching to the middle of the 



second joint regius. 



A'. Exognath of outer maxillipeds wanting ornatus. 



PANULIRUS REGIUS Capello. 



Panulirus regius Capello, Desc. tres esp. nov. Crust. Afr. Occ., Lisboa, 1864, p. 5, 



fig. 1 ; Mem. Acad. R. Sci. Lisboa, CI. Sci, Nat., new ser., II, 1865, Pt. 2. 

 "^.Senex longipes Pfeffek, Verb. Nat. Ver. Hamb.-Altona (2), V, 1881, p. 41. 



West African localities. — Cape Yerde Islands (Capello) ; Liberia (Mus. 

 Phila. Acad. E"at. Sci.); Monrovia and St. Thomas Island (Pfeffer); St. 

 Thomas Island (Osorio) ; Benguela (Osorio). 



PANULIRUS ORNATUS (Fabricius?, Herklots). 



Palinurus ornatus Herklots, Addit, Fauna Afr. Occ., 1851, p. 15. 

 West Africa. — St. George-del-Miua, Guinea (Herklots). 



Genus PALINOSTUS Bate. 



PALINOSTUS PHOBERUS Rochebrune. 



PalinusUis phoierus Rochebrune, Bull. Soc. Philom. Paris (7), VII, 1883, p. 173. 



West African localities. — Mouth of the Gambia and of the Casamauce 

 (Rochebrune). 



Tribe CARIDEA. 



Family Y^^MIDJE. 



KEY TO the west AFRICAN GENERA OF THE FAMILY PEN^ID^. 



A. First three pairs of trunk-legs Avith exopods Penceus. 



A'. Trunk-legs without exopods Sicyonia. 



Genus PENCEUS Fabricius. 



KEY TO THE WEST AFRICAN SPECIES OF THE GENUS PEN^EUS. 



A. Carapace without a median groove running from the rostrum to the posterior 



margin velutinus. 



A'. Carapace with a median groove behind the rostrum. 



B. Base of feet of third pair armed with strong spines caramote. 



B.' Base of feet of third pair without spines. 



C. Telsou with lateral spines canaliculatus. 



C. Telson without lateral spines Irasiliensis. 



