of (he G^cnM5 Corydoras. 219 



21. Corydoras nattereri. 



Steiud. SitziiDgsb. Akad. Wieu, Ixxiv. 1877, p. 143, pi. xi. fig. 1. 

 Corydoras juquice, II. vou Iheriug, Rev. Mus. Paulist. i. 1907, p. 37. 



Depth of body 2f to 3 in the length, length of head 3^^ to 

 3^. Diameter of eye 3^ to 4 in the length of head, inter- 

 orbital width 2t to 2|. Snout blunt^ shorter than postorbital 

 part of head ; suborbital narrow, less than diameter of eye ; 

 biirbels just reaciiing gill-opening. Occipital plate longer 

 than broad. Dorsal I 7 ; spine | to 4 the length of head ; 

 free edge of fin straight, the rays decreashig from the first ; 

 1, '2, or 3 longer than spine ; base about equal to distance 

 from adipose fin, which is preceded by 2 to 4 median scutes. 

 Anal I 5-7. Caudal deeply emarginate. Pectoral spine 

 reaching anterior part or middle of pelvics. Scutes goi^i » 

 humeral shields not in contact below, on each side separated 

 by one scute from base of pelvics, A dark lateral band 

 broadening forwards ; a dark spot below anterior part of 

 dorsal fin ; fins immaculate. 



Eastern Brazil. 



1-2. 50-55 mm. Rio Janeiro. R. von Ihering. 



3-4 (co-types of C, juquice). R. Juquia, S. Paulo. „ 



50-55 mm. 



22. Corydoras macrosteuSj sp. n. 



Depth of body 2% to 3 in the length, length of head 3;^ to 

 3i. Diameter of eye 6 in length of head, interorbital width 2. 

 Snout ^ the length of head or less ; suborbital deep, 1^ the 

 diameter of eye and twice its distance from the upper lip ; 

 barbels reaching gill-opening. Occipital plate longer than 

 broad ; process with concave edges. Dorsal I 7 ; spine ^ 

 the length of head or less ; fin rounded, with 5 or G rays 

 longer than spine ; base less than distance from adipose fin, 

 which is preceded by 3 or 4 median scutes. Anal I 6. 

 Caudal emarginate. Pectoral spine reaching base of pelvics. 

 Scutes 2iii2) humeral shields not in contact, on each side 

 separated by one scute from base of pelvic fins. Biownisii 

 above, yellowish below ; a broad dark lateral band tapering 

 backwards; fins dusky. 



San Paulo, Brazil. 



1-4 (types). 60 mm. Rio Piracicaba, Sau Paulo. R. von Ihering. 



