430 A Revision of the' 



Profile greatly depressed at the occiput, mouth more or less inferior. 

 Eye large, longer than snout, 3 to 3^ in the head, 1^ in interorbital. 



Scales of the back small, becoming larger towards the breast, where 

 they are several times as large as on the back. All the scales are more 

 or less ciliated, without longitudinal ridges. 



Highest dorsal ray about equal to the length of the head. Caudal 

 broad, widely forked, the lobes shorter than the head. Anal long, 

 emarginate, the tip of the first rays scarcely reaching the base of the last, 

 shorter in young. Base of anal equals head behind the pupil. Pecto- 

 rals reaching to ventrals, ventrals not to vent. 



Dusky above, light below, everywhere with metallic reflections. 



Head 3f-3i, depth 2I-2I-. D. 12-13; A. 13-14. Scales 16-61 to 70-10. 



Other specimens from San Paolo may be referred to this species. 



133. CURIOTATUS FAI.CATUS sp. nov. 



Types, No. 20,340, three specimens, .18-. 23 m. Xingu; Senhor Vin^ 

 has. 

 No. 20,189, one specimen, .18 m. Gurupa; Agassiz. 



Closely related to C. knerii, from which it differs in having a strictly 

 terminal mouth. 



Shape of G. knerii, the profile less depressed, the postventral ridge 

 less prominent. A very broad anterior and posterior adipose lid. Dor- 

 sal emarginate. None of its rays filiform. Anal long and falcate, its 

 base somewhat longer than the snout and half the orbit. Highest anal 

 ray reaching posterior third of the base of the anal. Pectorals not 

 nearly reaching to ventrals, and ventrals not to vent. 



Head 3f ; depth 2^. D. 11-13; A. 12-13. Scales 14-64-11. 



Zl 34. CURIMATUS SIOTEUIiATCS sp. nOT. 



Types, No. 20,194, three [specimens, .155 to .165 m. Tonantins; L^ 

 Agassiz. 

 No. 20,198, five specimens, .145 to .16 m. Fonteboa; L. Agassiz. 



Related to C. essequibensis, differing in the vertical scaling. 



Back greatly arched, profile steep. Preventral region flat ; postventral 

 region with a prominent keel. Predorsal region trenchant. 



Scales all more or less ciliate; caudal naked. 



Profile somewhat depressed at the occiput. Mouth inferior, the snout 

 pointed. Eye 1 in snout, 3^-3^ in head, If in interorbital. 



Highest dorsal ray longer than head. Caudal widely forked. Anal 

 emarginate, the longest ray reaching past the base of last ray, Ven- 

 trals reaching vent, which is 'just in front of the anal. Pectorals 

 reaching slightly beyond origin of ventrals. 



Silvery, bluish above. Dorsal with many minute black dots, some of 

 which are aggregated near the middle of the fin to form an ill-defined, 

 band; tips of the dorsal and middle caudal rays blackish. 



