552 CALIFORNIA ACADEMY OF SCIENCES. 



Head naked; a band of scales along back, following 

 dorsal outline, composed of two rows of scales for most 

 of its length, but the posterior five or six scales are in a 

 single row; the outer and anterior edge of each scale is 

 embedded, the inner and posterior edge is strongly ctenoid, 

 so the opposing edges of the rows are ctenoid edges; 

 a single row of 37 scales along lateral line, the anterior 

 ones rougher than the others. 



Dorsal spines slender, the fins not connected; front of 

 anal slightly nearer tip of snout than base of caudal; 

 pectorals rather wide, reaching a little past front of soft 

 dorsal. 



Color olive-gray, with faint irregular darker cross-bars 

 on back, the first under middle of spinous dorsal, the 

 second under first fourth of soft dorsal, the third under 

 last fourth of soft dorsal, indications of one on caudal 

 peduncle, and a dark streak at base of caudal fin; sides 

 and back mottled, under parts white; ventrals and anal 

 white, other fins crossed with dark wavy lines, 



This species is closely related to Icelinus borealis, dif- 

 fering from it in having a smaller eye, a stouter caudal 

 peduncle, a slightly wider interorbital space, shorter bar- 

 bels behind eye, the barbels at occiput not so constant in 

 their presence, and in having the end of maxillary in a 

 different relation to the eye. 



The eye of Icelinus borealis is contained only three 

 times in the length of the head in specimens of the same 

 size as Icelinus microfts, and the maxillary scarcely reaches 

 past pupil. This comparison is based on specimens of 

 /. borealis taken by the " Albatross " in the Straits of 

 Fuca and in Bristol Bay, Alaska. 



About twenty-five specimens taken near Port Ludlow 

 with the dredge, the largest an inch and a half in length. 



The types are in the collection of Leland Stanford 

 Jr. University, bearing the number 5045. 



