PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 149 



est width of the head is nearly equal to its greatest length and exceeds 

 its greatest depth. The interocular region is shallow concave, and the 

 vertex and nape are somewhat elevated. The snout is obtuse and mod- 

 erately depressed. The body is rather abrnbtly compressed at the vent, 

 where its thickness equals only one-third of the length of the head. 

 The anterior dorsal rays are regularly graduated, and much shorter 

 than the rays in the middle of the fin. The longest dorsal ray is one- 

 half as long as the head. The length of the eye is contained 4 times 

 in that of the head, which equals one-fourth of the total length with 

 caudal. The length of the snout equals one-third of that of the head. 

 The nostrils are tubular, the anterior pair having much the longer 

 tubes, their distance from each other equaling the length of the eye. 

 The maxilla extends to below the anterior margin of the pupil. Denti- 

 tion as in L. fdbricii. The ventral disk is nearly circular, its length 

 contained 8 to 8J times in the total length. The distance of the dorsal 

 from the snout equals nearly one-third of the total length without the 

 caudal. The length of the caudal equals about one-seventh of the total 

 length. The greatest height of the body equals the length of the head. 

 The pectoral extends to the origin of the anal. 



Colors of specimen 26625 taken from the living fish. 



(Dredged oft" Indian Point (Cape Tchaplin), E. Siberia, Behring Strait, 

 August 15, 1880.) 



Upper parts gray, punctulated with brown ; on the top of the snout 

 and on head and back, as far as beginning of dorsal, two concentric 

 stripes or elongated rings of brown inclosing gray areas; similar stripes 

 along side of head, and extending back to near middle of body; also on 

 posterior part of body; between these long stripes are two irregular 

 rings of brown inclosing gray; a brown stripe along lower part of head 

 and body, blending into a wider area of brown of the lower parts; belly 

 yellow on the sides, and punctulated with brown; iris brown, mingled 

 with a little vermilion; pupil has a yellow margin; fins brown and 

 liunctulated ; a dark band at caudal base; snout whitish on top. 



A more common pattern of coloration is the following: 



Head and body very light brown or gray intermingled with brown; 

 belly and under surface of head lighter; dorsal and anal with some 

 irregular dark markings simulating bands; caudal with three dark 

 bands ; sometimes the posterior half of the body is mottled with dark 

 blotches. 



Cottus humilis, u. s. 



Museum number 27972; collector's number (1700). Chamisso Island, 

 Eschscholtz Bay, August 31, 1880. 



D. X, 16 ; A. 13 , V. I, 3 ; P. 18 ; Br. VI. 



Head broad, subtriangular, much depressed, contained 2f times in 

 total length, caudal included. Greatest depth of head contained 2| 

 times in its greatest length. Eye equal to interocular space, contained 

 twice in length of snout and 4 times in postorbital portion of head to 



