ICHTHYOLOGY OF VENEZUELA — SCHULTZ 93 



paratype from Caracas: Dorsal rays ii, 7 (ii, 7); anal rays iii, 14 (ii, 15); 

 pectoral rays 16-15 (15-16); pelvic rays i, 6-i, 6 (i, 6-i, 6); scales from 

 upper edge of gill opening to midcaudal fin base 38 (39); scales from 

 dorsal origin to front of anal 9 (9) ; scales in front of dorsal fin to occiput 

 27 (28); number of scales in a zigzag row around caudal peduncle 

 15 (16); scales in a zigzag row across breast between lower edges of 

 base of pectoral fin 9 (10). 



^■^.. 



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Figure 12. — Rivulus bondi, new species: Holotype (U.M.M.Z. No. 141914), 40.2 mm. in 

 standard length. Drawn by Mrs. Aime M. Awl. 



Head depressed, but body compressed posteriorly, the greatest depth 

 about 5 and head 3.5 in standard length; margin of eye not free; 

 eye equal to snout and about 3K in the head; interorbital wider than 

 eye and about 2 in the head; rear margin of eye a trifle closer to rear 

 of head than tip of snout; origin of dorsal to midcaudal fin base con- 

 tained 2.9 times in distance from tip of snout to dorsal origin; origin 

 of anal fin a trifle closer to midcaudal fin base than middle of post- 

 orbital length of head; base of last anal ray under the base of third 

 from last ray of dorsal fin in posterior half of base of dorsal fin; pectoral 

 fins reaching more than halfway to anal origin but not to bases of 

 pelvics; pelvic fins reach just to anal origin; least depth of caudal 

 peduncle contained about 1.3 in length of peduncle from base of last 

 anal ray to midbase of caudal fin; caudal fin rounded; distal margin 

 of anal fin rather straight; pectorals, pelvics, and dorsal with rounded 

 margins; usuaUy fourth from last ray of dorsal and anal fins longest. 



Coloration. — The color in alcohol of the holotype consists of a light 

 brownish background with rows of dark brown spots on sides, mostly 

 posteriorly, the row along midaxis most prominent and beginning 

 behind head, the other rows paler forward; each row of black spots 

 corresponds to a row of scales and the dark spot is at center of each 

 scale; dorsal and caudal fins barred, with a black ocellate spot at upper 

 caudal fin base; bases of last two dorsal rays with a pale spot enclosed 

 above by a brownish bar on base of fin; undersides in front of pelvics 

 plain in color; underside of head finely pigmented; dorsal side of head 

 and back dark brownish; lower lip or chin brownish; margin of anal 

 fin and outer edge of pelvic fins blackish; pectorals finely pigmented. 



The coloration of the adult males is considerably different from the 



