58 THE CYPRINODONTS. 



in short groups in transverse series, as in P. vivipara. Eyes large, more than 

 one third of the liead, nearly twice the snout, two thirds of forehead. 

 Branchiostegal rays five, the fifth frequently split to the base as if formed 

 by the union of two. Fins small, excepting caudal. Dorsal origin slightly 

 behind the middle of the total length, in the female ; anal origin several rays 

 farther forward. On males the anal is still farther forward, between the ven- 

 trals, and is modified to form an intromittent organ as long as the head. The 

 dorsal also is advanced in this sex and the second ray of each ventral extends 

 back at the side of the anal process. Pectorals small in females, reaching a 

 vertical from the base of the ventral ; longer in males and reaching behiud 

 a vertical from the origin of the anal. Caudal about as long as the head, 

 median rays longer. Scales large. Intestine long. 



Olivaceous, dark on back, hghter on flanks, silvery below. Sides more or 

 less iridescent. Cheeks silvery. Scales with darker edges. Faintly darker 

 from eye to middle of caudal. Top of head dark, with a small spot of lighter 

 in the middle. Along the middle of the flank some have series of scales 

 marked in the anterior portion by silvery and on the hinder half of each 

 scale by brown. Commonly with a black spot on the middle of the posterior 

 rays of the dorsal. Vertical narrow bars of silvery and brownish are more 

 common on the males. Dorsal and anal in cases edged with blackish. Cau- 

 dal with faint transverse cloudings or bands, or plain. A vertebral line and 

 blackish mottling on the edges of the caudal base are sometimes present. 



Hayti ; San Domingo. 



Pcecilia vittata. 



Plate IV. Fig. 11, teeth; Plate VIII. fig. 10, male. 



Pcecilia vittata Guicli., 1S55, Poiss. Cuba, 221, pi. V, fig. 1 ; Gth., 1S66, Cat., VI, 339; Jor., 1887, P. 

 U. S. Mus., IX, 564. 



Limia vittata Poey, 1855, Mem., I, 389, 391, 463, pi. 31, fig. 14-16, —1861, Mem., 11,383,-1868, 

 Repert., II, 169, 411, — 1876, An. Soc. Esp., V, 141. 



Oambtisia vittata Blk., 1860, Cypr., 485. 



Limia cubensis Poey, 1855, Mem., I, 388, 391, pi. 31, fig. 12-13, pi. 32, fig. 10-11,-1861, Mem., II, 

 383,-1868, Repert., II, 411,-1876, An. Soc Esp., V, 141,-1880, An. Soc. Esp., IX, 247. 



Gambusia cubensis Blk., 1860, Cypr., 485. 



Pmcilia cubensis Gth., 1866, Cat., VI, 340. 



Limia pavoniim Poey, 1876, An. Soc. Esp., V, 142. 



Pcecilia pavonina Jor., 1887, P. U. S. Mus., IX, 564. 



B. 6 ; D. 10 (rarely 9) ; V. 6 ; P. 14-15 ; LI. 27-30 ; Ltr. 9 ; Vert. 

 15 + 14. 



Body stout and thick, compressed, deep in the caudal region. Head 

 short and thick, nearly as wide as high, about two ninths of the length to the 



