246 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



or inconspicuous, but sometimes, in young specimens, formed of 

 bright silvery-wliite pigment; other silver}^ spots or blotches may 

 occur on the lighter intervals of the back or sides; pectorals, dorsal, 

 and caudal cross-banded; a black blotch at base of upper and 1 at base 

 of lower pectoral ra3's; tips of elongate dorsal spines of the male 

 black; ventrals and anal unmarked. Coast of Alaska, in Bristol Ba}^, 

 south of Sannak Island and north of Unalaska, at depths of from S to 

 61 fathoms. Also at Karluk, off Kamchatka and Robben Island. 



This description from Dr. Gilbert's account. 



Dr. Schmidt reports this species as occurring in the Japan Sea. 



7. ICELUS Kr0yer. 

 Icelus Kr0Yek, Natur. Tidsskr., I, 1845, p. 2.53 {}i(f>n<(ti(s). 



Head large. Preopercular spines 4, the upper hooked, simple or 

 bifurcate at tip, without antler-like processes. Occiput with or with- 

 out spines. Bod}^ slender, fusiform, with a dorsal series of bony 

 plates from neck to base of caudal; lateral line with osseous tubercles, 

 scattered scales on sides and bell}". Gill membranes l)roadly united, 

 free from the isthmus, no slit behind fourth gill. Dorsals separate; 

 ventrals I, 3, thoracic; no pectoral filaments. Villiform teeth on jaws; 

 vomer, and palatines. Branchiostegals 6. Artie regions. 



{"Ik^Xos^ Icelim^ son of Ilypnus, the god of sleep; Kr0yer says: 

 " Navnet valgt med Hensyn till ulkearternes Dorskhed, saavelsom til den 

 Nordlige Bopael, nogle af Oldtidens Forfattere anviste S0vnguden.'') 



7. ICELUS SPINIGER Gilbert. 



Icelus f^pmi(ji'r (liLBEKT, Rept. U. 8. Fish Coiiim., 1893 (1896), \). 412, pi. xxiv; 

 Bristol Bay and Unalaska, at Albatross Stations 3216, 3223, and elsewhere, 

 in 17 to 121 fathoms. — Jordan and Evekmann, Fish. N. and M. Amer., II, 

 1898, p. 1914; same specimens. — Schmidt, Faune de la mer du Japon, etc., 

 1903, p. 15; Japan Sea. 



Head 2f to 3 in length; depth 5; eye 3 to 3i in head. D. IX-20; 

 A. 17; P. 18; V. I, 3. Closely resembling Tcelm hicornis of the 

 Atlantic, but differing conspicuousl}" in the armature of the dorsal 

 series of plates in the comparatively plane occiput, and in other char- 

 acters. Caudal peduncle very slender, its depth Hh; in orbit; mouth 

 large, the maxillary reaching slighth" beyond middle of orl)it, its 

 length one-half head; teeth ver}' finely villiform, present in rather wide 

 bands in ja^vs and on vomer and palatine l)ones; nasal spines strong, 

 separated by the high ascending processes of the premaxillaries; inter- 

 orbital space very narrow% grooved, its width less than one-half diame- 

 ter of pupil; orbital rim becoming elevated anteriorly and posteriorly, 

 and, at the latter |)oint. strongly denticulated; behind the orbital region 

 the occiput is shallowl}" concave, l^eing l)ounded laterally by 2 low, 

 evenly rounded ridges, which become narrower posteriorly, and end 



