31<)0 Bulletin ^ 7 , United States National Museum. 
1157 (c). ( HIKOSTOMA IMJOMKLAS. Jordan A: Snyder. 
Head 3;?; depth 4?; depth of caudal peduncle 3^ iu head; eyeSJ; snout 
2^; interorbital sj)ace44; height of spinous dorsal 3? ; .soft dorsal 2J ; anal 
2; length of pectoral 1?; ventral 24; caudal 14; D. IV-11; A. 19; pectoral 
15; scales 53-16, 9 between dorsals. Head slender, triangular; eye small, 
nearer tip of snout than to edge of opercle by a distance eijual to half 
diameter of pupil; width of preorhital area somewhat greater tlian 
diameter of jiupil; interorhital space slightly convex; snout i»ointed; 
upper Jaw projecting a little beyond the lower; cleft of mouth almost 
horizontal; lips enlarged posteriorly, the lower lip folding over the upper 
at their junction ; angle of mouth on a level with lower )>art of pupil; 
maxillary almost vertical in ]>ositiou, its distal end not extending back- 
ward as far as anterior edge of orbit; teeth large, curve<l inward, not 
arranged in definite rows; none on vomer or palatines; vertebric 45. A 
tolerably well-defined lateral line extending along the body about 8 scales 
below the first dorsal, the pores absent on some of the scales; scales 
crenate, largest along lateral color band; a po.st-occipital i)atch of minute, 
closely-crowded scales extending backward nearly to a line connecting 
bases of pectorals; a narrow band of similar scales just posterior to gill- 
openings, and on base of caudal, the latter exteudiug on inter- radial 
membranes half their length; scales between dorsals not abruptly smaller 
than those near by, nor crowded closely together; head with scales except 
on snout, jireorbital region, and on lower jaw; first 3 spines of dorsal 
nearly e^ual in length, the fourth a little shorter; first dorsal ray longest, 
the others gradually shorter; anal inserted on a perpendicular passing 
midway between dorsals, first ray longest, others successively shorter; 
edge of fin slightly concave; pectoral pointed; extending beyond base of 
ventrals a distance equal to diameter of pupil ; veutrals not quite reaching 
vent. Color iu alcohol, yellowish olive; a distinct silvery lateral band, 
the light color of which is underlaid with dark pigment, extending from 
upper part of base of jiectoral to caudal, wider and brighter iu color 
between dorsal and anal, growing narrower on caudal peduncle, widening 
at its end; scales of upper part of boily with dusky coloring on their 
edges; dorsals, i)ectoral, and caudal with dark color; eye dusky above, a 
dark baud on interorbital S2>ace; snout and jaws black. 
Chirostoma promelus is distinguishable from other known specues of the 
genus by the projecting ui»per jaw and the black snout. 
One specimen other than the tyi)e was obtained. In it the j»rojection 
of the upper jaw is more pronounced than in the type. The gill-rakers 
and abdominal viscera had been lemoved from both. (.Jordan A .Snyder.) 
Known only from Guadalajara, .Jalisco, Mexico, where 2 si)ecimeus were 
obtained in the market. (Type, No. 61.56, L. S. Jr. L'niv. Mus. Coll. J. O. 
Snyder.) {nfjo, before; /leXa^, Idack.) 
Chiroglomapromelat.JORVAyicSsYDEH, Bull. U. S. Fish Com. 18!»t* (I9o0), 136, Guadalajara, 
Mexico. 
