Edentulous Genera of Gurimatince. 421 



Light brown above with bluish or silvery reflections; a pale lateral 

 band margining the brown of the back; a blackish spot at base of 

 caudal. 



Head 3§; depth 2f-2i. D. 13; A. 10-11. Scales 5 or 6-35-5. 



8. CURIOTATUS NASUS. 



Curimatus nasus Steind., '82, 20, pi. V., fig. 2 (Canelos, Ecuador). 



9. CURIinATUS TROSCHEIill. 



Anodun troschelii Gthr., '59, 418 (Western Andes of Ecuador). 

 Curimatus troschelii Gthr., '64, 290; Steind., '80a, 40 (Guayaquil). 



10. CURIMATUS £IiEGANS. 



Curimatus elegans Steind., '74a, 31 (Rio Arassuahy, tributary of the 

 Jequitinhonha). 



Habitat, streams of southeastern Brazil. 



Six specimens, about .10 m. Rio Arassuahy; Rio Ipajica at Pernam- 

 buco; Bahia. 



A species which can readily be recognized by its peculiar color-mark- 

 ings. 



Elongate slender. Preventral region rounded or slightly depressed; 

 post ventral region rounded. Predorsal region with an indistinct median 

 keel; postdorsal region with three keels. Dorsal and ventral outlines 

 gently arched. 



Profile regularly convex; premaxillary broad, the snout projecting 

 considerably beyond the mouth. Eye 8| in head, 1| in interorbital. 



Scales mostly smooth- edged. 



Pectorals not reaching to ventrals, ventrals not to vent. 



Light brown above, silvery below, everywhere with metallic reflec- 

 tions; a silvery lateral band. Lateral line bordered by black; an elongate 

 blackish spot at base of caudal; two middle rays and lower lobe of cau- 

 dal dusky; a blackish spot at base of middle dorsal rays. 



Head 3i-3f ; depth 3i-3f. D. 12-13; A. 10-11. Scales 35-37. 



lOa. CURIMATUS EliEGANS BAHIENSIS var. nov. 



Types, No. 20,324 and 20,325, forty-four specimens, .052-.11 m. 

 Bahia; Thayer expedition. 

 Depth 2|-3. Back always greatly arched. Lat. 1. 33-35. 



11. CURIMATUS ARGENTEUS. 



Silver-fish. 



Curimatus argenteus Gill, '58, 62 (Trinidad); Gthr., '64, 289 (copied); Liit- 

 ken, '74a, 225 (Trinidad). 



