414 A Mevision of the 



4. CURIMATOPSIS. 



CuRiMATOPSis Steind., '76a, 33 {macrolepis). 



Type, Curimatopsis macrolepis Steind. 



This genus, as far as known, is composed of two species. It is closely 

 related to Curimatus. 



Teeth none. Lateral line developed on anterior scales only. Mouth 

 oblique, lower jaw entering the profile. Tongue long and narrow, 

 quite free. 



1. CURIMATOPSIS 1TIACROI.EPIS. 



Curimatus (Curimatopsis) macrolepis Steind., '76a, 33 (Tabatinga; 

 Manacapuru; mouth of the Rio Negro). 



Habitat, Amazons and tributaries from Rio Negro to Tabatinga. 



Numerous specimens, .035-.07 m. Tabatinga; Lake Hyanuary ; 

 Cudajas. 



Compressed elongate. Preventral region flattish, without enlarged 

 scales; post ventral region rounded; predorsal region to near the dorsal 

 flattened; postdorsal region rounded. Scales cycloid, 4-6 longitudinal 

 ridges on each scale; caudal scaled at base only. 



Profile from nares straight, convex near the dorsal. 



Eye 3 in the head, IJ in the interorbital. 



Origin of dorsal fin a little nearer to tip of snout than to base of 

 caudal. Anal emarginate. Pectorals not reaching ventrals: ventrals 

 about to the vent; their origin a little nearer to base of caudal than to 

 tip of snout. 



Air-bladder extending to the anal. 



Depth of caudal peduncle about 3 in the head. 



Light brown, with silvery reflections; a lighter line through centre of 

 scales; a silvery lateral band terminating in a large black spot at base 

 of caudal. 



Head 3-3^; depth 2f-3i. D. 11-12; A. 11. Lat. 1. 30. 



2. CURIMATOPSIS MICROIiEPIS sp. nov. 1 



Type, No. 20,344, one specimen, .115 m. Jatuarana. M. Navez. 



Compressed elongate. Dorsal and ventral outlines equally arched. 

 Back and belly rounded. 



Profile very little depressed. Margin of lower jaw rounded. Eye 

 little longer than snout, 3^ in head, If in interorbital. 



Scales all small, entire. Caudal naked. Lateral line developed on 

 about 12 scales only. 



Origin of dorsal equidistant from tip of snout and base of upper 

 caudal fulcra. Anterior dorsal rays prolonged, reaching the adipose 

 fin. Anal slightly emarginate, the anterior rays reaching tip of last 

 rays. Pectorals not nearly reaching to ventrals; ventrals not to vent. 



Light brown, with iridescent metallic reflections. Margins of the jaws 



