y>H‘r2 . 
Bulletin ^ 7 , United States Xational Museum. 
ll.>7 (<•). < HIHOSTOMA ('KYSTAM,1.M >I. Jordan A: Snyder. 
He:ul depth 4J; depth of caudal ])ediiucle 34 in head; eye 5J; snout 
2^: interorhital space 44; height of spinous dorsal 4'r ; soft dorsal 24 ; aual 
2i; length of ]>ectoral It; ventral 2^; caudal 15; 1>. V-13; A. 24; P.l.o; 
scales .of. -18, 10 hetween dorsals. deepest above ventrals, widest at 
insertion of jiectorals; head long and pointed, its upper contour straight; 
snout, viewed from above, sharply pointed, the lower jaw jwojecting 
beyond upper a distance equal to not more than lialf diameter of orbit; 
eye nearer tip of snout than to posterior edge of opercle a di.stauce 
equal to diameter of pupil ; month obli(ine, the cleft extending down- 
ward to a level with lower edge of pupil; lips thickened iiosteriorly, the 
lower folding over the upper at angle of mouth; teeth minute, in wide 
patches, not arranged in detinite rows, on upper and lower jaws; no teeth 
on vomer or palatines; gill-rakers on first arch 27, slender, the length of 
longest equal to diameter of pupil; vertebra- 44. An indelinite lateral 
line extending along the body about 0 scales below tirst dorsal, the pores 
absent on many of the scales; scales crenate. largest along color-band, 
growing smaller abo\ e and below, much smaller and closely crowded on 
the boily anterior to the pectoral tin, from the isthmus to the occiput; a 
few small scales at upper end of opercle, along bases of fins, and on the 
inter-radial membranes of caudal for half its length; scales between 
dorsals large and not crowded together; lower jaw and upper jiart of 
snout naked; first 3 spines of dorsal about the same length, reaching, 
when depressed, to ^ their length of insertion of soft dorsal ; first dorsal ray 
longest, others graduallj' shorter; anal inserted on a iierpendicular passing 
through a point half way between origins of dorsals, base much longer 
than that of dorsal; first dorsal ray longest, others gradually shorter to 
middle of fin, all remaining rays of about the same height; caudal deeply 
forked, the tips rounded; pectoral pointed, extending a little past base 
of ventrals; tips of ventrals extending to vent. Body, during life, trans- 
lucent, with a slightly bluish tinge; in alcohol, yellowish; upper scales 
with dusky edges; top of head dusky; upper part of eye dark; fins, 
except ventrals and anal, with a little dusky color; a silvery color band 
extending from upper part of pectoral base to caudal, narrower on caudal,, 
widening at base of caudal. 
C. cryHtaUinum closely resembles C. ocoilane in general appearance. The 
much shorter lower jaw and the smaller eye of C. crystaUinnm arc at once 
distinguishing characters. Guadalajara and Laguna de Chapala, Mexico. 
(.Iordan & Snyder.) 
Two specimens from the Guadalajara market are shrunken so that the 
orbit is larger, and the teeth more evident than in those taken at Ocotlan. 
Known from Laguna de Chapala, near Ocotlan, .Jalisco, Mexico, and the 
market at Guadalajara. (Type, No. 6158, L. S. Jr. Uuiv. Mus. Coll. .1.0. 
Snyder.) 
Chirostoma crystallinum, JORDA.\ Snyder. 1!u 11. U. .S. Fisli Com. 1S99 (1900), 139, Caguna 
de Chapala, Mexico. 
