426 A Revision of the 



of the highest ray scarcely reaching the lower caudal fulcra. Ventrals 

 reaching nearly to the vent, pectorals f to ventrals. 



Light brown above, a white lateral band, and silvery below. Every- 

 where with metallic reflections. A golden stripe along the lateral series 

 of scales. A white spot at base of each caudal lobe. 



Head 3f ; depth little more than 3. D. 12-13; A. 9-10. Scales 7-45 

 to 47-6. 



This species differs from bimaculatus in the partially-scaled caudal, 

 the color, etc. 



21. CURimATUS PliATANUS. 



Curimcdtts platanus Gthr., '80a, 12 (Rio de la Plata). 



22. CURI]?IATUS ASPER. 



Curimattis asper Gthr., '68a, 243, fig. 8 (Xeberos ; Huallaga). 



23. CURIOTATUS RUTILOIDES. 



Huimba-shitari. 



Curimatus rutiloides Kner, '59a, 141, pi. I., fig. 2 (Matto Grosso ; Barra 

 do Rio Negro); Gthr., '64, 290 (copied); Cope, '71a, 258 (Ambyiacu); 

 Steind. , '81a, 35(Teffe; Manaos; Matto Grosso; Jatuarana); Steind., 

 '82a, 11 (Huallaga). 

 Habitat, Amazons and tributaries. 



24. CURIIHATUS HYPOSTOMUS. 



Curimatus hypostomus Boulenger, '87a, 172 (Ucayale). 



25, CUROIATUS Mil ARTII. 



Curimatus mivartii Steind., '78a, 32, pi. 13, fig. 1 (Rio Magdalena) ; 

 id. '80a, 15 (Cauca). 



26. CURIMEATUS liEUCISCUS. 



Curimatus leuciscus Gthr., '68a, 239 (Huallaga). 



Habitat, Huallaga ; Obidos ; Hyavary; Manacapuru. 



Four specimens, .10-. 15 m. Obidos. 



Elongate slender ; ventral outline straight from tip of snout to near 

 anal. Dorsal outline arched, especially in front of the dorsal. Pre- 

 ventral region flattish ; postveutral region rounded. Predorsal region 

 with a median keel ; postdorsal region rounded. 



Profile not depressed over eyes. Mouth inferior. Eye little longer 

 than snout, 3-3j in head, l^-lf in interorbital. 



Scales serrate, somewhat deciduous. Caudal naked. 



Highest dorsal ray about equal to the head in length. Anal short, 



