Edentulous Genera of Ourimatince. 439 



breast, all crenate or serrate. Caudal naked. Lateral line decurved 

 anteriorly. 



Profile more or less depressed at the occiput, the head wide; mouth 

 more or less inferior. Eye about 1 in snout, 3-3i in head, l^-lf in in- 

 terorbital. An anterior and a posterior adipose lid. 



Some of the dorsal rays filiform and reaching in some specimens past 

 the adipose. Caudal broad, the upper lobe little longer than the head. 

 Anal long and low, emarginate, its base equal to snout and half the 

 orbit; the tip of the longest ray reaching little if any past the base of 

 last ray. Pectorals reaching to ventrals or shorter, ventrals not to 

 vent. 



Silvery, bluish above. Dorsal with black dots. 



Head '3|-3i; depth 2|-2f. D. 12-13; A. 11-12. Scales 14-60 to 64- 

 «to9. 



31. CURI1TIA.TUS CYPRINOIDES. 



Salmo cyprinoides Linnaeus, 1766, 514. 

 Characinus cyprinoides Lacepede, 1801, " 272 and 274." 

 Curimatus cyprinoides C. and V. xxii., 7 (Amazon; Surinam; Esse- 

 quibo; Cayenne); Castelnau, '59a, 57 (Amazon); Gthr., '64, 290 

 (River Capin, Para) ; Cope, '71a, 258 (Ambyiacu). 

 Salmo edentulus Bloch, pi. 380; Bloch and Schneider, 1801, 472. 



Habitat, Amazons and tributaries; Guianas. 



Dr. Boulenger has kindly examined the specimens of this species in 

 the British Museum. These have ordinary scales in the postventral 

 region. Dr. Steindachner is certainly wrong in identifying specimens 

 from the Rio Puty with a serrate belly with those in the British Mu- 

 seum. 



A large number of specimens from Para represent the C. cyprinoides 

 as understood by Dr. Giinther. 



The pectorals scarcely reach the ventrals. Scales 14 or 15-56 to 60- 

 8 to 9. 



Some of the references that we have given with this species may per- 

 haps refer to C. knerii. 



32. CURIOTATUS ITIACROPS sp. nov. 



Types, No. 20,305, 20,302, 20,309, 20,301, over twenty specimens. Rio 

 Puty; O. St. John. 

 No. 20,311, eight specimens. San Gongallo; O. St. John. 

 A species very abundant in the Rio Puty, reaching .25 m. in length. 

 Compressed ovate, rather deep, the back and belly equally arched. Pre- 

 ventral region flat, with a median series of large scales; postventral 

 region very narrow, the median series of scales equitant. Back narrow, 

 not keeled. 



