NO. 1199. CB USTA CEA NS OF WEST AFRICA— B A THE UN. 315 



PALiEMON HASTATUS Aurivillius. 



Palamon (Leander) hastatiis AuiuviLi^ivs, K. Sv. Vet. -Akad. Handl., XXIV, 1898, 

 p. 27, pi. IV, figs. 3-6. 



West African locality. — Kaineruu, iii the sea at Beticka ba Mallale 

 (Aurivillius). 



PALAMON MACULATUS (Thallwitz) . 



Leander maoulatus Thallwitz, Abh. Ber. K. Zool. Mus. Dresden, 1890-91 (1891), 

 No. 3, p. 19. 



Locality. — West Africa (Thallwitz). 



Genus BITHYNIS Philippi. 



KEY TO THE WEST AFRICAN SPECIES OF THE GENUS BITHYNIS. 



A. Large (ilielipeds with palm cylindrical or nearly so. 

 B. Rostrum with more than two teeth ou lower margin. 



C. Carpus of large chelipeds regularly cylindrical acanthurus. 



C. Carpus of large chelipeds thickened in the distal portion. 



jamaicensis voUenhovenii. 



B'. Rostrum with one or two teeth on lower margin paucidens. 



A'. Large chelipeds with palm swollen and compressed, wider than the carpus.. o?/ersJi. 



BITHYNIS JAMAICENSIS VOLLENHOVENII (Herklois) . 



Palcemon voUenhovenii Herklots, Tijdschr. v. Entom., Nederl. Entomol. Vereen., 

 1, 1858, p. 96. 



West African localities. — Mouth of Mesurado Eiver, Monrovia (O. F. 

 Cook, collector) ; St. Paul's River, Mount Coffee (O. F. Cook, collector) ; 

 Guinea (Herklots); Lagos (Ortmann); Fluss Meiue, Kamerun (Auri- 

 villius); St. Thomas Island, in Rio Quija and Rio Gamoela, 200 meters 

 altitude (Osorio); Kongo coast (de Man); Upper Kongo (J. H. Camp, 

 collector) ; Kuanza River at GuTigS: {Benedict, lis jamaicensis f) ; Benguela, 

 Catumbella, Biballa, (Osorio, as jamaicensis). 



BITHYNIS ACANTHURUS (Wiegmann) . 



Palcemon acanthurus Wiegmann, Arch. f. Nat., II, Pt. 1, 1836, p. 150. 

 Palemon macroirachion Herklots, Addit. Faun. Afr. Occ, 1851, p. 15. 

 Palcemon africanus Kingsley, Bull. Essex Inst., XIV, 1882, p. 107. 



Range. — Mouth of Rio Grande, Texas; Antilles; Escoudido River, 

 Nicaragua; Brazil; Ecuador (von Martens); West Africa. 



West African localities. — Sierra Leone (von Martens) ; near Boutry, 

 Guinea (Herklots); Kamerun (Aurivillius): Fluss Meme, Bibundi and 

 Ekundu; St. Helena (Bate). 



BITHYNIS PAUCIDENS (Hilgendorf). 



Palcemon {Eupalcemonf) paucidens Hilgendorf, SB. Ges. Naturf. Fr. Berlin, 

 1893, p. 155. 



West African locality. — Adeli, near Bismarckburg, Togoland (Hil- 

 gendorf). 



