106 CALIFORNIA ACADEMY OF SCIENCES. 



Moz; Obidos; Cudajas; Curupira; Tabatiuga; Arary; Manes; Lago 

 Jose Assu); Steiud, '82a, 11 (Eio Amazouas; Iquitos). 



Erythrinus viitaius C. & V., xix '46, 499, pi. 585 (Cayenne; Surinam; 

 Brazil). 



Erythrinus cinereus (ji\\\. 58a, 53 (Trinidad). 



Erythrinus kessleri.HteinH. 76b, 38 (Babia). 



Habitat: Eio Parabyba to Guiana and Peru; Trinidad, 



The young of this species is sometimes uniform dusky, 

 without spots on the fins. This is doubtless the condition 

 figured by Marcgrave. 



Dr. Gunther identified ('64, 283) Erythrinus vittatus C. & 

 v., with E. anitceniatus. He also ('68a, 239) pronounces 

 specimens from Trinidad, presumably the cinereus of Gill, 

 identical with unitceniaius . 



Dr. Stein dachner ('76b, 38) described his lessleri from 

 three specimens 2'' 8'''- 4'' 6"' long, collected at Bahia. 

 We have examined two of these specimens and also a num- 

 ber of others from the same locality, and have found teeth 

 on the pterygoids in very narrow patches. On comparison 

 with the smallest specimens from other localities, which 

 were larger however, the pterygoid patches of teeth were 

 a little wider. There cannot be the least doubt that the 

 Jcessleri of Steind. is the young of unitceniatus. 



We have examined 90 specimens .07-. 31 m. from Sao 

 Matheos; Kio Doce; Bahia; Para; Cudajas; Obidos; Villa 

 Bella; Serpa; Santarem; Silva, Lake Saraca; Hj^anuary; 

 Maues; Porto do Moz; Curapera; Tabatinga; Lake Jose 

 Assu; Goyaz. 



The typical specimens have a dark lateral band, which 

 when present is most marked in specimens .20 m. long. 

 This band is sometimes absent in specimens otherwise like 

 those with the band. There are three dark bands extend- 

 ing from the eye to the edge of the opercle; these are also 

 sometimes wanting. The dark opercular blotch can be 

 seen in all specimens. Specimens .20 m. long from 

 Sao Matheos are uniform dark-brown, the fins of a similar 

 color, without any spots. Other specimens from the same 



