120 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



head width 1.3 (75.5%) in its length. Least width of bony inter- 

 orbital 3.1 (32.0%) in head length. Snout acute in dorsal view but 

 snout tip rather rounded. Snout length 1.4 (69.2%) in head length. 

 Dorsal profile of snout slightly concave. Wlien directed posteriorly, 

 both rictal barbels of both sides reach a point on a vertical line from 

 posterior eye margin. Greatest diameter of orbit 4.4 (22.8%) in 

 head length. Greatest width of suborbital 2.9 (35.0%) in orbit. 

 Dorsal fin 1,7, last fin ray split to its base. Dorsal fin damaged, 

 its spine and anteriormost rays partially lost as shown in figure 3. 

 Dorsal fin spine rather slender, considerably more slender than the 

 pectoral fin spines. Adipose fin spine 0.95 (104.8%) in orbit. Anal 

 fin ii,5, last ray split to its base. Bohlke (1950) reported the anal 

 fin count as "1,5, the last ray widely split to its base." I found 

 that in taking counts and measurements I had counted this fin as 

 i,5; however, during careful examination of the fin while preparing 

 figure 3, I found that what appeared to be a single nonpungent spine 

 was actually two very closely adpressed nonpungent spines. Pectoral 

 elements 1,10. Pelvic fin rays i,5 on both sides. Caudal fin, although 

 both lobes broken, with principal rays 7/7. Pectoral fin spine (fig. 4) 

 has 30 spinules along its posterior border. 



Figure 4. — Corydoras foivleri Bohlke. Pectoral fin spine of holotype, ventral view, left 



spine. 



Color. — Specimen appears somewhat faded. Overall body color 

 very pale brown. Ventral region below gills white. Just posterior to 

 this region, at origin of belly scutes, belly region becomes very pale 

 brown. Pattern of dark brown markings shown in figure 3. This 

 pattern described by Bohlke (1950) as follows: 



. . . dark blotch along base of dorsal fin, abruptly shifted ventrally at a 

 vertical with the fifth articulated dorsal ray. This posterior continuation 

 of the blotch covers the lower two-thirds of the upper row of lateral scutes, 

 and continues back to below the adipose dorsal. Several small dark spots at 

 the upper end of the gill openings, somewhat resembling a broken-up humeral 

 spot. Top of head, snout, and cheeks covered by wav}' longitudinal dark 

 lines. 



Little can be added to this description. 



Discussion. — As noted by Bohlke (1950), Corydoras fowleri appears 

 to be related to C. treitlii; however, as he remarked, it differs from 0. 

 treitlii in possessing imbricated thoracic and abdominal plates and a 

 longer body in relation to head length. In addition to these charac- 



