THE CYPRINODONTS. 63 
D. 7-8; A. 8-9; V. 5; LI. 26-28; Ltr. 8. 
Depth of body two sevenths and length of head nearly one fourth of the 
length to the base of the caudal. Males rather more slender. Eye longer 
than snout, not quite one third of head, three fifths of interorbital space. 
Forehead flat. Dorsal origin somewhat nearer to end of snout than to end 
of caudal, opposite first ray of anal on females. Anal of male advanced, 
between the ventrals, which are elongate ; anal process as long as the head, 
without hooks. Caudal large, rather longer than the head, obtusely rounded. 
Free portion of tail somewhat elongate, base of anal being one third of its 
distance from the caudal. Ventrals reaching the anal. Pectorals as long as 
the head, not reaching the ventrals. 
Female yellowish olive, scales with a narrow blackish edge, belly silvery, 
trunk above the belly blackish. 
Male with two brown streaks along the trunk, sometimes confluent into 
a band, a brown streak along the middle of the side of the tail, a round 
black spot behind the shoulder, another at the commencement of the 
caudal streak, and a third at the root of the caudal. One or two of these 
spots may be absent. 
Trinidad ; Venezuela. 
The male from Venezuela differs in color from those of Trinidad: it has 
large silvery patches between the brown streaks and a large ovate black 
spot in the middle of the side of the tail. 
(Giinther). 
The following is the original description: “Griingelblich mit einem 
schwarzen Netzwerk, dessen Maschen den Riindern der Schuppen parallel 
liegen, am Bauche silbrig. Schuppen in 7 Liings- und in 27 Querreihen ; 
obwohl einige derselben durchbohrt erscheinen, ist doch keine deutliche 
Seitenlinie zu sehen. Ganze Linge 39, Hihe 9, Liinge des Kopfes 7 Mil- 
limeter. D. 8; A, 10. Caracas; in dem Guayre-Flusse von Gollner 
gesammelt.” 
Pocilia Gillii. 
Plate V. fig. 2, teeth. 
Xiphophores Gillii Kn. & St., 1866, Abb. Ak. Wien, X (1864), Ext. p. 25, pl. 4, fig. 1, — Mb. Ak. Wiss. 
Minch. 
Pacilia Gillii Gth., 1868, Tr. Zool. Soo. Lond., VI, 485; Eig., 1891, P. U. 8S. Mus., XTV, 65. 
Pacilia elongata Gth., 1866, Cat., VI, 342, — 1868, Tr. Zool. Soo. Lond., VI, 484, pl. 85, fig. 2; St, 
1874, Sb. Ak. Wien, LXXIV, Ext. p. 19; Jor. & G., 1883, P. U. 8. Mus., V, 623, — 1890, P. U. S. Mus., 
X11, 180; Jor., 1886, P. U. S. Mus. VIII, 368. 
Pacilia Boucardii Steind., 1876, Sb, Ak. Wien, LXXVI, Ext. p. 8, pl. 3, fig. 2-3. 
Pacilia chisogensis Gth., 1866, Cat., VI, 342; Eig., 1893, P. U. S. Mus., XVI, 57. 
