Jordan and Evermann. — Fishes of North America. 3159 
Known only from the Rio A'erde, near Agnas Calientes, Mexico. (Type, 
No. 6154, L. S. Jr. Univ. Mus. Coll. J. O. Snyder.) 
Eslopsarum urge, .Jordan & Snyder, Bull. IT. S. Fish Com. 1899 (1900), 133, Rio Verde, 
near Aguas Calientes, Mexico. 
11.57 (b). CHIROSTOMA CHAPAL.E, Jordan & Snyder. 
Head 4; depth 5^-; depth of caudal peduncle 3 in head; eye 3f; snout 
34; interorhital space 4; height of spinous dorsal 3; soft dorsal If; anal 
If; length of pectoral If; ventrals 24; caudal i®,,; D. IV-10; A. 20; 
pectoral 14; scales 47-13, 6 between dorsals. Body .slender, compressed, 
its deepest part below first dorsal; eye large, nearer tip of snout than 
to posterior edge of opercle by a distance equal to 14 times the diam- 
eter of pupil; interorhital space convex, its width about e(iual to diam- 
eter of pupil or to preorbital area; symphysis of lower jaw project- 
ing a little beyond tip of upj>er, the lips meeting; mouth obli(iue, lips 
thickened posteriorly, the lower folding over the upper at their union; 
angle of mouth on a level with center of pupil; maxillary nearly verticab 
its distal end in advance of a vertical from anterior edge of orbit, a dis- 
tance eqiral to f the diameter of pupil. Teeth minute, in bauds, not 
arranged in definite rows; no teeth on vomer or palatines; gill-rakers on 
first arch 30, very slender, the length of longest equal to diameter of 
orbit; peritoneum black ; air-bladder A’ery large, extending posteriorly to 
a point above middle of anal fin; vertebrm 45. A Avell-defined lateral 
line extending along the body on the eighth row of scales below the first 
dorsal. Scales large, crenate, not notably reduced in size nor closely 
crowded together on any part of the bodj^; those on post-occipital region 
and anterior to pectorals small; scales extending on basal f of inter-radiiil 
membranes of caudal; lower jaw, snout, and preorbital space naked; first 
2 spines of dorsal highest, the following 2 a little shorter; first ray of 
second dorsal highest, others gradually shorter; anal inserted a little 
anterior to a perpendicular passing halfway between the origins of 
dorsals, first ray longest, others successively shorter; when the fin is 
elevated, its edge is coucaA'e; caudal deeply forked, the tips pointed; 
pectoral notably pointed, extending past base of ventral a distance equal 
to diameter of orbit; ventrals extending to vent. Color in life, tran.slu- 
cent; a silvery lateral baud 1 scale wide, bright, and distinct posteriorly, 
becoming indistinct anteriorly; upper edge of lateral band with dusky; 
scales on dorsal part of body edged with dark dots; upper and lower 
jaws with dark dots; upper part of eye black, the dai’k, pigmented 
arachnoid showing through the thin skull. (.Jordan A Snyder.) 
C. chajmlo; is closely related to C. (jrandocule, Steindachner. It differs in 
having a smaller eye and larger scales. The former has 44 to 51 scales in 
the lateral series, :ind 12 to 14 in a transverse series, while ('. (jrandocule 
has 60 to 62 scales in the lateral series and 15 or 16 in a tran.sverse series. 
Known only from Laguna de Chapala, near Ocotlan, Jalisco, Mexico. 
(Type, No. 6165, L. S. Jr. Univ. Mus. Coll. J. O. Snyder.) 
Chirostoma chapalce, Jordan a Snyder, Bull. U. S. Fish Fom. 1899 (1900), 135, Laguna 
de Chapala, Mexico. 
