276 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



UCA TANGERI (Eydoux). 



Gelasimus tangeri Eydoux, Mag. de Zool., 1835, CI. VII, pi. xiv. 

 Gelasimus perlatus Herklots, Addit. Fauna Afr. Occ, 1851, p. 6, pi. i, fig. 3. 

 Gelasimus ciniatodns Rochebrune, Bull. Soc. Philom. Paris (7), VII, 1883, p. 171. 

 Uca tangieri Ortmann, Zool. Jahrb., Syst., X, 1897, p. 356. 



The perlatus form of this species differs from typical tangeri only in 

 the great reduction of the larger cheliped of the male and its compara- 

 tive smoothness, there being no tubercular ridges on the inner side of 

 the palm. The single male of perlatus in the U. S. ]!>rational Museum 

 collection, from St. Paul de Loanda, appears to be an aborted tangeri. 



Bange. — From Portugal (Oapello, Osorio), to north and west coasts 

 of Africa, as far as Algiers and Angola; West Indies (Miers); '?Bahia 

 (Kingsley). 



West African localities. — Eufisque, Senegal (Hilgendorf); Dakar, 

 (O. F. Cook) ) Goree Bay, 9 to 15 fathoms (Miers) ; Sierra Leone (Miers) ; 

 Eock Spring, Monrovia (O. F. Cook); mouth of Mesurado River (O. F. 

 Cook); Liberia (Hilgendorf); Grand Bassam (Studer); Guinea (Kings- 

 ley); Beyah River, Ashantee (Benedict); near Boutry, Guinea (Herk- 

 lots); Lagos (Studer); Bibundi, Kamerun (Aurivillius); St. Thomas, 

 at logo-logo, and Praia Almoxarife (Osorio); Ogove (Thallwitz); 

 Chinchoxo (Hilgendorf, Studer); mouth of the Kwilu River (Berlin 

 Mus.); mouth of the Kongo (Studer); Loanda (Hilgendorf, Studer); 

 St. Paul de Loanda (Benedict); Barre du Dande, Benguella and Lobito 

 (Osorio) ; " Les deux Mamelles " and " Cote des Maringouins pointe des 

 Chameaux" (Rochebrune). 



UCA MORDAX (Smith)? 



Gelasimus mordax Smith, Trans. Conn. Acad. Sci., II, 1870, p. 136, pi. ii, fig. 3; pi. 

 IV, figs. 4, 4a. 



Range. — Bahamas to Rio de Janeiro. West Africa? 



West African locality. — Liberia (O. F. Cook, collector); one small 

 but mature female. 



This single specimen is very like females of Uca mordax from 

 America. Its identity can not be determined with certainty until the 

 male is discovered. 



Dimensions. — Length, 8.6 mm.; width, 12.6 mm. 



Family GECARCIKIDJE. 



KEY TO THE WEST AFRICAN GENERA OP THE FAMILY GECARCINID^. 



A. Palpus of the outer maxillipeds inserted on the inner face of the third joint near 

 its summit and concealed under the joint Gecarcinus. 



A'. Palpus of the outer maxillipeds inserted at the external angle of the third joint 

 and exposed to view Cardisoma. 



