248 Memoir Sears Foundation for Marine Research 



Dorsal origin equidistant between tip of snout and caudal base; 13 rays. Anal 

 origin under posterior rays of dorsal; rays 23. Pelvic fin inserted somewhat nearer to 

 base of pectoral than to origin of anal. Pectoral extending a little beyond base of 

 pelvic, its length a little more than half of length of head. Axillary scale of pectoral 

 extending somewhat beyond midlength of fin (according to figure). Scales 38. 



Color. Olive above, silvery on sides and below. Snout blackish above. Fins pale 

 orange; caudal rays blackish at tips. 



Range and Habitat. Known only from the holotype, a specimen 140 mm TL, from 

 fresh water, from the Jurua River, a tributary of the Amazon in Brazil. 



References : 



Cetengraulis juruensis Boulenger, Trans, zool. Soc. London, 14 {10), 1898: 427, pi. 41, fig- 3 (orig. descr.; 

 type local. Rio Jurua, Brazil; cf. C edentulus)\ Eigenmann, Rep. Princeton Exped. Patagonia, 1896- 

 1899, J (4), 19 10: 452 (refs. to orig. descr., habitat); Campos, Arqu. Zool. estad. Sao Paulo, J (7), 1941 : 

 202, fig. 15 (descr., range) ; Hildebrand, Bull. Bingham oceanogr. Coll., 8(2), 1943: 158 (descr. after 

 Boulenger). 



