116 . THE CYPRINODONTS. 
EMPETRICHTHYS, 
Empetrichthys Gilb., 1893, N. A. Fauna, No. 7, pt. 2, p. 233. 
Head and body compressed, mouth oblique, chin steep. Teeth conical, 
in bands. Pharyngeal bones massive ; teeth resembling molars, much as in 
Fundulus majalis, Branchiostegal rays five. Dorsal and anal opposed, behind 
the middle of the body. Intestine of moderate length. 
Allied to Fundulus through the more compressed species. 
Empetrichthys Merriami. 
Empetrichthys merriami Gilb., 1893, 1. c., p. 234, pl. 5. 
B. 5; D.11-13; A. 13-15; Ll. 33-34; Ltr. ca. 16. 
Deeper and more compressed than Umbra limi, to which there is some 
resemblance. Head compressed, crown slightly convex. Mouth very oblique ; 
maxillary reaching little behind front edge of the eye. Eye small, once the 
snout, half the interorbital space, one fifth of the head. Fins medium, angles- 
blunt or rounded. Dorsal near midway from head to end of caudal, opposite 
the anal. Caudal broad, subtruncate. Pectorals rounded, extending half 
way to vent. Intestine one and one half times as long as the body. 
Back brownish ; lighter on flanks and below; irregularly blotched or 
clouded on the flanks with brown and white ; fins brownish, more or less 
clouded with brown. Scales on the ventral surfaces in cases with lighter 
borders, 
Ash meadows and the Pahrump Valley, Nevada, near the California line. 
(Gilbert.) 
ZYGONECTES. 
Zygonectes Agassiz, 1853, Am. Jour. Sci., XVI, 185, — 1854, Am. Jour., XVII, 353, — Fish. Tenn., 
15; Grd., 1859, P. Phil. Ac., 113; Jor. & G., 1882, B. 16 U. S. Mus., 338. 
Micristius Gill, 1865, Can. Nat., ext. p. 24; Jor. & C., 1877, B. Buf. Soc., III, 142. 
Haplochilus (part) Gthr., 1866, Cat., VI, 310. 
Intermediate in general features between Fundulus and Haplochilus. 
Body compressed posteriorly, depressed forward. Crown flat. Snout short, 
broad. Mouth slightly oblique; upper jaws shorter, protractile, not ex- 
panded and produced as in Haplochilus ; lower longer, firmly joined. Teeth 
conical, in bands. No vomerine teeth. Dorsal and anal behind the middie 
of the body, opposed, the former smaller and originating above or a little 
