PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 437 



openings are almost horizontal; the dorsal begins on the head; the 

 tongue is largely free in front. 



25. Letharcus velifer, n. sp. 



Body rather robust, somewhat compressed ; its greatest depth a little 

 more than two-fifths the length of head. Head large, abruptly tapering 

 anteriorly; snout very slender and pointed, projecting considerably 

 beyond the lower jaw; its length contained nearly 10 times in that of 

 the head, and equaling a little more than twice the diameter of the very 

 small eye. Nostrils with nasal tubes rudimentary, posterior nostril 

 labial, anterior under the tip of snout. Cleft of mouth, from tip of 

 snout, 4 in head. Eye nearer tip of snout than angle of mouth. Lower 

 jaw short and weak. Tongue short, free in front. Teeth small, pointed, 

 subequal, iu narrow bands on jaws and vomer. 



Length of head contained 6i times in that of trunk; head and trunk 

 equal 1| times length of tail. 



The dorsal is unusually high, its height at the nape equaling distance 

 from tip of lower jaw to angle of mouth; it begins at the end of the 

 first third of the head. Free end of tail rather sharp. The anal fin is 

 wanting or represented by a minute fold near the end of the tail. No 

 trace of pectorals. 



Gill-openings large, subinferior, oblique, convergent anteriorly; their 

 length more than 3 times the breadth of the isthmus and equal to that 

 of the lower jaw. 



Lateral line very distinct, extending forward in a broad curve over 

 the opercular region to below beginning of dorsal. Four conspicuous 

 pores on each side of lower jaw, three behind each eye, three at the 

 nape in front of dorsal, one on top of the head, and four on each side of 

 upper part of snout, besides a few smaller ones about the lips. 



Colordarkbrown, slightly mottled with darker, not paler below. Head 

 paler than body. Dorsal fin pale below, with a broad blackish margin. 



There are four individuals of this new fish, which were collected in 

 West Florida by Kaiser and Martin; the types are numbered 31458; 

 they vary in length from 15 inches to 18 inches. 



United States National Museum, 



Washington, August 3, 1882. 



DESCRIPTIOIV OF A XEW SPECIES OF OOBY (OOBIOSOMA lOS 

 FROITl VAIVCOUVER'S ISI.A1VI>. 



By DAVID S. JORDAIV and CHARLES H. OILBERT. 



Gobiosoma ios, sp. no v. (No. 29672.) 



Head 4^ in length to base of caudal; depth 6f. D. VI-15; A. 

 about 12. 



Body comparatively long and slender, moderately compressed, thfj 

 back not elevated. Head long and low, rather pointed anteriorly; the 



