46 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 119 



like typical unifasciatus. Poecilobrycon eques have spawned in my 

 aquaria and I have raised the resulting young. Also I have seen 

 young of eques raised by other aquarists. In none of these have I 

 seen any specimens that look like unifasciatus. The description of 

 egues given by Hoedeman is hard to follow and seems somewhat 

 contused and inconsistent. However, his main thesis seems to be 

 that the differences noted by Steindaclmer between egues and uni- 

 ■fasciatus are those of age and sex. In any event, the descriptions 

 given here should serve to distinguish eques and unijasciatus and put 

 an end to further confusion. From the key and descriptions, it can 

 be seen that the species are quite distinct in their morphology. 



Specimens examined. — Thirteen, SU 50263 (three ahzarin preparations, SU 

 50264), SL 27.0-34.8 mm., Brazil, State of Amazonas, Igarape do Mai Joana 

 into Rio Negro near Mandos, Dec. 24, 1924, Carl Ternetz.— One, MCZ 19769, 

 SL 31.5 mm., Brazil, State of Amazonas, Lake Hyanuary, near Manaos, 1865- 

 1866, Thayer Expedition, Mr. Navez.— One, MCZ 19935, SL 28.0 mm., Brazil, 

 Jutahy, 1865-1866, Thayer Expedition, James, Thayer and Tailisman. — Two, 

 MCZ 19787, SL 29.0-38.3 mm., Brazil, Lake Jose Assu, 1865-1866, Thayer 

 Expedition, Louis Agassiz.— Fifteen, MCZ 19591, SL 25.0-33.0 mm., Brazil, 

 State of Amazonas, Teffe, 1865-1866, Thayer Expedition, Louis Agassiz. — Two, 

 SU 50266, SL 23.0-27.2 mm., Venezuela, Rio Orinoco, Cafio de Quiribana, 

 opposite Pan de Azucar, near Caicara, May 7, 1925, Carl Ternetz. — Five, SU 

 50265, SL 26.0-33.0 mm., Venezuela, Rio Orinoco, creeks at high water into 

 Laguna San Raphael, Caicara, Apr. 28, 1925, Carl Ternetz. — Two (paratypes 

 of P. ocellatus Eigenmann), CAS(IUM) 11703, SL 31.2-32.8 mm., British Guiana, 

 Demerara River, Wismar, 1908, Carl H. Eigenmann. — Ten (paratypes of P. 

 ocellatus Eigenmann), CAS(IUM) 11704 (one specimen as alizarin preparation), 

 SL 29.6-34.0 mm., British Guiana, Rockstone sandbank, Essequibo River, 1908, 

 C. H. Eigenmann. — Two (paratypes of P. ocellatus Eigenmann), SU 21963, SL 

 31.8-33.5 mm., British Guiana, Rockstone, Essequibo River, 1908, Carl H. 

 Eigenmann. — Three (paratypes of P. ocellatus Eigenmann), CAS(IUM) 11705, 

 SL 29.2-37.1 mm. and three (paratypes of P. ocellatus Eigenmann) CNHM 

 52782, SL 32.0-34.0 mm., British Guiana, Gluck Island, Essequibo River, 1908, 

 Carl H. Eigenmann. — Three (paratypes of P. ocellatus Eigenmann), CAS(IUM) 

 11706, SL 28.2-29.2 mm., British Guiana, Rupununi, Essequibo drainage, 1908, 

 C. H. Eigenmann. — One (paratype of P. ocellatus Eigenmann), CAS(IUM) 

 11708, SL 30.0-33.5 mm., British Guiana, Konawaruk, Potaro River, 1908, 

 C. H. Eigenmann.— Two, SU 19049, SL 31.0-34.4 mm., British Guiana, no 

 other data.— Three, SU 19048, SL 27.0-28.0 mm., British Guiana, no other 

 data. — One, SU 25613, SL 29.5 mm., aquarium specimen, no other data. — Two, 

 SU 50267, SL 30.1-30.5 mm., aquarium specimens, no other data. — Two, SU 

 50268, SL 27.8-30.4 mm., alizarin preparations, aquarium specimens, no other 

 data. — One, SU 50438, SL 30.6 mm., British Guiana, Karanambo, "Grass Pond," 

 Rupununi River, Essequibo drainage, Sept. 19, 1957, Rosemary Lowe (McCon- 

 nell) .—Three, SU 50435, SL 23.2-31.4 mm., British Guiana, Moreby Creek, 

 Rupununi River near Karanambo, Essequibo drainage, Sept. 17, 1957, Rosemary 

 Lowe (McConnell). 



