of P<£ciliid Fishes. 501 



Pectol*al as long as Lead without snout ; pelvics not nearly 

 reaching anal. Brownish above, yellowish below ; vertical 

 fins Avith series of small dark spots. 

 Hio Negro. 



11. Uivulus hartii. 



Hindus micropus [non Steind.), Giinth. Cat. Fish. vi. p. 327 (1866) ; 



Garmau, Mem. Mus. Comp. Zool. xix. 1895, p. 136. 

 HaplucJnhcs hartii, Bouleng. Ann, & Mag. Nat. Hist. (6) vi. 1890, 



p. 190 ; Regan, Proc. Zool. Soc. 1906, i. p. 389, pi. xxi. tig. 2. 



Depth o£ body 4^ to 5^ in the length, length of head 3^ 

 to 4. Head broader than deep. Diameter of eye 3 to 4 in 

 the length of head. 37 to 42 scales in a longitudinal series. 

 Dorsal 8-10 ; origin above middle or posterior part of anal, 

 twice as distant from some part of operculum as from base 

 o£ caudal fin. Anal 15-17, ending below posterior ^ of 

 dorsal. Pectoral about | the length of head, not extending 

 to pelvics, which reach vent or origin of a^ial. Olivaceous; 

 sides with a red spot on each scale; vertical fins usually 

 orange, Avith or Avithout small dark spots : caudal ocellus 

 often present. 



Venezuela and neighbouring islands. 



1-10 (types). 70 mm. 

 11,12-15. 35-95 mm. 

 16-25. 75 mm. 

 26-27. .35 mm. 



12. Rivulus ornatus. 

 liivuhis ornatus, Garman, Mem. Mus. Comp. Zool. xix. 1895, p. 139. 



Form of the majority of the species. Length of head 4 

 in that of the fish. Diameter of eye 4 in length of head. 

 31 scales in a longitudinal series. Dorsal 6 ; origin twice 

 as distant from base of pectoral as from base of caudal. 

 Anal 10-11, ending below first ray of dorsal. Pectoral as 

 long as head, nearly reaching pelvics, which do not reach 

 anal. Puncticulations form blotches along the back, streaks 

 along the sides, series of small spots on the fins, a band on 

 the lower lip, and a streak baclvAvard from below each eye; 

 sometimes pale bands on the back meet dark vertical bars 

 on sides. 



Amazon. 



Total length 35 mm. 



