394 Annals of the Carnegie Museum. 



Adipose spine very straight, slightly longer than the eye; slightly less 

 than the base of the fin. Anal spine weak, rough in front. First 

 three anal rays longest, reaching well beyond the base of the caudal. 

 Pectoral spine straight, equal to the dorsal spine, smooth on the outer 

 side, toothed within. Pectorals long, reaching to the middle of the 

 short ventrals. Ventrals reaching the second scute in front of the 

 anal in the cotype, much shorter in the type. Caudal forked, upper 

 lobe longest, 2.3 in the length. 



Dark above, yellowish on the belly and lower one-third of the sides, 

 whitish under the head and along the lateral line. Pectoral spine 

 dusky, pectoral and caudal light. Dorsals, anal, and ventrals with a 

 distinct reddish tinge not quite as dark as the upper parts of the body. 



Genus Brochis Cope. 



17. Brochis dipterus Cope. 



Brochis dipterus Cope, Proc. Acad. Nat. Sci. Phila., 1871, 278 (Ambyiacu River). 

 No specimens. 



18. Brochis cceruleus Cope. 



Brochis cceruleus Cope, Proc. Acad. Nat. Sci. Phila., 1871, 277, pi. 7, fig. 2, and 

 pi. 4, fig. 3 (Ambyiacu River). 



No specimens. 



Genus Aspidoras von Ihering. 

 19. Aspidoras rochai von Ihering. (Plate XXVI, fig. 3.) 

 Aspidoras rochai von Ihering, Notas Prelim., I, 1907, 30. 



3455 C. M. Three, 23-34 mm - (without caudal), Rio Agua Branca, 

 Nov. 6, 1907. Coll. Haseman. 



3456 C. M. One, 42 mm., Rio Zinga, Nov. 7, 1907. Coll. Haseman. 



3457 C. M. Five, 31-48 mm. Rio Paiaia, Nov. 8, 1907. Coll. 

 Haseman. 



Genus Corydoras Lacepede. 



Key to the Species of Corydoras. 

 a. Caudal plain. 



b. Coracoid processes moderately expanded on the breast in both sexes, 

 leaving only a narrow naked area between them; occipital process 

 triangular, pointed at the tip; a dark band extending from the upper 

 caudal lobe forward, one or more longitudinal series of dark spots 

 along the sides near the lateral line elegans Steindachner. 20. 



