THE CYPRINODONTS. 53 



Body short, much comjDressed ; caudal pedicel deep ; head depressed, 

 crown flattened. Snout short, broad, blunt ; chin steep. Mouth wide, open- 

 ing upward ; lower jaws short, weak, loosely joined ; upper shorter than 

 lower, protractile. An outer series of slender, spatuliform, or oar-shaped, 

 hooked, movable teeth on each jaw, and behind these a band of very suiiill 

 one to three cusped teeth. Branchiostegal rays five. Dorsal and ventrals 

 small. Dorsal origin behind the middle of the body, excluding the caudal. 

 Caudal deep, convex on hind margin. Anal opposed to the dorsal or farther 

 forward, modified in the male to form a short intromittent organ, about as, 

 long as the head. Scales large. Intestine long, much convoluted. Type 

 Poeeilia vimpara Bl. Schn., P. Schneideri Val. 



West Indies ; Mexico ; Central America to Brazil. 



Pcecilia vivipara. 



Plate V. Fig. 4,7, teeth; Plate VIII. Fig 11, male. 



Pmcilia vivipara Bl. Schn., 1801, Syst., pp. lii, 452, pi. 86, f. 2 ; Goldf., 1820, Handbuch, II, 10 ; Flem., 

 1822, Pbil. Zool., II, 386; M. & Tr., 1848, Schomb. Guiana, III, 632; Blk., 1S60, Cypr., 486,-1803, 

 Atl., Ill, 140; Pet., 1864, Mb. Brl. Ak., 395; Gth., 1866, Cat., VI, 344 ; Jor., 1887, P. U. S. Mus., IX, 

 504; Eig., 1891, P. U. S. Mas., XIV, 65. 



Pcecilia Sc/i,ieiden\a\., 1828, Humb. Obs., II, 159,-1846, C. V. Poiss., XVIII, 135; Wagn., 1828, 

 Isis, XXI, 1054 ; Rich., 1837, R. Brit. Assoc, 213; Blk., 1860, Cypr., 486. 



Pcecilia surimmetisis Val., 1828, Humb. Obs., II, 158, pi. 51, f. 1,-1840, R. An., ed. ill.,, Poiss., 227, 

 pi. 95, f. 1,-1846, C. V. Poiss., XVIIl, 120; Wagu., 1828, Isis, XXI, 1054; Duv., 1844, Ann. So. Nat., 

 1(3), 313; Pet., 1864, Mb, Brl. Ak., 396; Eig., 1891, P. U. S. Mus., XIV, 65. 



Pcecilia unimaculala Val, 1828, Humb. Obs., II, 158, pi. 51, f. 2, 5, 6,-1846, C. V. Poiss., XVIII, 

 128; Wagn., 1828, Isis, XXI, 1054; Jen., 1842, Beagle Zool. Eish, 114; Gth., 1866, Cat, VI, 346; Kuer, 

 1807, Novara Eische, 345; Hens., 1868, Arch. f. Naturg., XXXIV, 358,-1869, Arch. Nat., XXXV, 89; 

 Mart., 1876, Preuss. Exp. Zool., I, 37, 401 ; Steind., 1881, Denk. Ak. Wien,XLIV, extr. p. 9; Eig., 1881, 

 P. U. S. Mus., XIV, 65. 



Pmcilia unipunctata Guer., 1838, loon. Poiss., 28, pi. 47, f- 3. 



Molitmia surinaviensis Pet., 1844, Bericht Brl. Ak., 36; Blk., 1860, Cypr., 485. 



Pcecilia unimacula Blk., 1860, Cypr., 486. 



Oirardinus versicolor Gth., 1866, Cat., VI, 352. 



Hetera/idria versicolor Jor., 1887, P. U. S. Mus,, IX, 563. 



Pcecilia vivipera parae Eig., 1894, Ann. N. Y. Ac, VII, 629. 



B. 5; D. 8-9; A. 9-10; V. 6; P. 14-15; LI. 2G-28 ; Ltr. 8; Vert. 

 14+14. 



Body stout, short, thick, flattened above the shoulders, deep and narrow 

 in the caudal section. Head short, one fourth of the length to the base of 

 the caudal, much less than the height of the body, as broad as deep, flat on 

 the crown. Snout broad, short, length half of the width of the forehead, 

 nearly as long as the orbit, subtruncate ; chin moderately steep. Mouth 

 wide, one and one half times the eye, directed upward ; jaws weak, loosely 



