THE CYPUINODONTS. 



19 



Teeth conical, in bands ; 



anal modified, without a tube ; 

 pupil entire ; pelvis entire 

 intermaxillaries produced 

 intermaxillaries not produced ; 

 A. smaller than D. and farther back 

 A. and D. small ; D. backward of A. ; 

 mouth wide; chin low 

 mouth narrow ; chin steep 

 Teeth conical ; pupil entire ; pelvis entire ; 

 anal not modified 

 ventrals absent ; 



pharyngeal teeth slender 

 pharyngeal teeth thick, molars 

 ventrals present ; 



jaws with teeth in a single series 

 jaws with teeth in bands ; 

 pseudobranchisB absent ; 



intermaxillaries produced 

 intermaxillaries not produced ; 

 D. and A. nearly equal ; 



origin of D. forward of A. 

 first spine of D. strong 

 caudal forked 

 origin of D. backward of A. 

 D. smaller than A. and farther back 

 body and head compressed 

 body sharp-edged behind vent 

 pseudobranchiae present ; 



mouth resembling that of Fundulus 

 mouth resembling that of perch 



Gambusiinjb 

 Belonesox 



Page 



80 

 80 



Pseudoxiphoplborus 80 



Gamhusia 82 



Heterandria 90 



Haplochilin^ 93 



Orestias 145 



Em2)etrichthys 116 



Lucania 93 



Eaplochilichthys 156 

 Nothobranchius 158 



CYPRINOD ONTINjE. 



CYPRINODON. 



Plate I. Fig. 1-4, teeth. 



Cyprinodon La C; 1S03, Poiss., V, pp. xxxi, 4S6; Raf., 181.5, Aiial., 88; Cviv., 1817, R. An., II, 

 199, — 1829, R. An., II, 281, — 1836, R. An., I, .533 ; Flem., 1822, Phil. Zool., II, 386 ; Val., 1828, Hunib. 

 Obs., II, 164,-1846, C. V. Poiss., XVIII, 145; Wagner, 1828, Isis, XXI, col. 1056; Schinz, 1836, 

 Abb. Fische, 217 ; Guer., 1838, Icon., Poiss., 29; Stor., 1846, Syii., 183, — Mem. Am. Ac, 435 ; Dum., 

 1856, Ichth., 410 ; Blkr., 1860, Cypr., 481, — 1863, Atl. Cypr., Ill, 139 ; GUI, 1861, Cat., 51 ; Gthr., 1866, 

 Cat, 301,-1880, Intr., 614 ; Jor. & G., 1882, B. 16 U. S. Mus., 328. 



Lebia Les., 1821, J. Phil. Ac, II; Swains., 1838, Classif., I, 366,-1839, II, 190,311. 



Lebias Schinz, 1836, Abb,, 216 ; Guer., 1838, Icon. Poiss., 28 ; DcK., 1842, N. Y. Fish, 215 ; Stor., 

 1846, Syn., 179, — Mem. Am. Ac, II, 431. 



Pcecilia (part) Goldf., 1820, Haiidb., II, 17 ; McCleU., 1839, As. Res., XIX (2), 424. 



Trifarcius Poey, 1861, Mem., II, 305, 383 — 1868, Rep., II, 209, 411, — Mem., II, 305, 383. 



JordanetlaQooSit, 1880, P. U. S. Mus., II, 117; Jor. & G., 1882, B. 16 U. S. Mus., 327- 



