Jordan and Evermann. Fishes of North America. 691 



a. Scales very large, 23 to 25 in a lengthwise series; coloration plain; dorsal and anal dotted. 

 6. Dorsal rays 7; anal rays 7; coloration plain, the fins dotted. VIVIPARA, 1019. 



bb. Dorsal rays 9; anal rays 8. BUTLERI; GILLI, 1020; 1021. 



na. Scales moderate, 28 to 32 in a lengthwise series. 



c. Base of caudal with a black ocellus. PAVONINA, 1022. 



ce. Base of caudal without distinct black ocellus. 



if. Dorsal and anal each with 10 or 11 rays; scales 30 to 32-10; depth 3 to 3% in 

 length; sides with 2 rows of black dots. VITTATA, 1023. 



rfrf. Dorsal with 7 to 11 rays; anal rays G to 9. 



e. Body rather robust, the depth in adult more than % the length. 



MEXICANA; THERMALIS; CHISOYENSIS; PETENENSIS; SPHENOPS; 

 DOVII; COUCHIANA; BOUCARDI; VANDEPOLLI; DOJIINI- 



CENSIS; MELANOGASTEE; SPILURUS, 1024-1035. 

 ee. Body rather elongate, the depth in adult not more than % the length, 



ELONGATA; PRESIDIONIS, 1036; 1037. 



1010. PCECILIA VITIPARA, Bloch & Schneider. 



Depth 3; B. 5; D. 7; A. 7; scales 24; vertebrae 15 -f 13. Eye 3 in 

 head, or 2 in interorbital width. Greenish, each scale with the mar- 

 gin brownish ; dorsal fin with a small blackish spot in the middle ; 

 caudal with a black spot near the base of the upper and lower rays. 

 Brazil; Guiana; Martinique. (Giinther) ; not seen by us ; a species long 

 known, but never well described. (viviparus, bringing forth living 

 young.) 

 Paecilia vivipara, BLOCK & SCHNEIDER,* Syst. Ichthyol., 452, pi. 86, fig. 2, 1801, Surinam; Gt)N- 



THER, Cat., vi, 345, 1866. 



P<ecilia Surinam ensis, VALENCIENNES, Humboldt Observ. Zool., n, 158, 1817, Surinam. 

 Pcecilia schneideri, CUVIER & VALENCIENNES, Hist. Nat. Pofcs., xvm, 135, 1846, Surinam. 



1020. PCECILIA BUTLERI, Jordan. 



Head3ito3f ; depth 2| (adult) to 3fc (young). D.9; A. 6to8; scales 24 to 

 26-9. Origin of dorsal midway between base of caudal and front of eye, and 

 over tenth scale of lateral line; fins moderate, longest ray of dorsal 

 about as long as head without snout; caudal scaly at base; caudal 

 peduncle compressed and deep. Color uniform olive, the young with 

 faint, dark cross shades; caudal with a few black spots; dorsal Avith 

 numerous round, black spots in both sexes. Allied to Pcecilia dovii, but 

 with deeper body and larger scales. Length of adult 2 inches. 



Fresh specimens recently obtained by the Hopkins Expedition from the 

 Rio Presidio are described as follows: Head 3|; depth 3&. D. 9; A. 6; 

 scales 26-9. Eye equal to snout, 3 in head; interorbital width 2. Pecto- 

 ral H in head ; caudal 1 in head ; longest dorsal ray in males 1 in head, 

 in females If. Body deep and compressed, the form as in Adinia, the 

 straight anterior profile rising considerably to front of dorsal. Dorsal 

 small, even in the male, inserted over or somewhat before anal, much 

 behind anal in female. Teeth in two series, well separated, the inner series 

 smaller and more close-set, not trifid; caudal peduncle" very deep, the fin 

 broad. Males larger than females, equally numerous, and with higher fins, 

 as in Mollienesia. Color of males green, with a pale-blue spot on each 



* In the figure of Bloch & Schneider the body is represented as marked by broad cross bands 

 of dark brown. 



