Edentulous Genera of Gurimatince, 417 



da. Sides with a dark spot at the fortieth scale, ocellatus, 28. 

 XX' Post-ventral region trenchant. 

 a. Preventral region rounded; jaws equal. isognathus, 29. 



a-2. Preventral region angular. 

 h. Some of the dorsal rays prolonged in a filament, 

 c. Lateral line 60 to 64. hnerii, 30. 



Ca. Lateral line 56 to 60. cyprinoides, 31. 



6a. Dorsal rays not produced. 



d. Scales 16-61 to 70-10. macrops, 32. 



d2. Scales 14-64-11. falcatus, 33. 



da. Scales 14-51 to 53-6. simulatus, 34. 



di. Scales 13-55-8. schomburgkii, 35. 



do. Scales 12-51-9. essequibensis, 36. 



**. Lateral line 85 to 110. Median line in front of dorsal naked in adult. 



(Semitapicis ^ subg. no v.) 



a. Preventral region rounded. 



b. Postdorsal region trenchant. planirostris, 37. 



&a. Postdorsal region rounded. laticeps, 38. 



tta. Preventral region trenchant. latioVy 39. 



1. CURIMATUS L.1BPIDURUS sp. nov. 



Types, Nos. 20,291 and 20,292, five specimens, .075-. 10 m. to base of 

 caudal. Rio San Francisco below the falls; C. F. Hartt. 



Closely related to alburnus, from which it differs chiefly in the num- 

 ber of scales. 



Compressed, dorsal outline more irregular than the ventral outline, 

 which is evenly curved to the anal. Preventral region rounded or 

 slightly flattened; postventral region more narrowly rounded. Predor- 

 sal region broad, with a distinct median and indistinct lateral keels; 

 postdorsal region rounded, or with three indistinct keels. Scales per- 

 sistent, all but those of the breast entire. Lateral scales all of about the 

 same size, each scale with two diverging ridges. Caudal lobes thickly 

 scaled to near their tip. 



Profile scarcely depressed over the eyes. Eye little longer than snout, 

 S-d^ in head, If in interorbital. A very narrow anterior and posterior 

 adipose lid. 



Highest dorsal ray a little shorter than the head. Anal short, some- 

 what emarginate. Pectorals not reaching to ventrals, ventrals not to 

 vent. 



Sides and lower parts yellowish, back bluish. Each scale of the sides 

 with a narrow median line of golden. 



Head 3i; depth 2i-2f. D. 12-13; A. 11-12. Scales 9-43 to 45-7. 



' Semita = a path, apex = crown, in allusion to the naked predorsal 

 line. 

 ANNALS N. Y. ACAJD. OF SCI., IV. Issued November, 1889. 



