484 PROCEEDINGS OF THE NATIONAL MURFAJM. vol.xxiv. 
snout 3 in body, the spines not varying- greatly in length, the last one 
connected by a nieni])rane to the back; soft dorsal well separated from 
spinous, its rays about equal to spines in length, highest in front; anal 
long, its origin nearer to the snout than base of caudal by a distance 
equal to the length of the eye. Pectoral, when spread, broadly 
rounded behind, its lower rays rapidly decreasing in size below, 
reaching well past front of anal; ventrals inserted behind base of 
pectorals a distance equal to f eye, their tips reaching to vent. 
Lateral line running high. Vertebrae 17+30=47. 
Color silvery, light brown above; a dark brown streak following- 
the lateral line, broken up into spots anteriorly; quadrangular, dark 
brown marks along the back at base of dorsals, chain-like markings in 
front of dorsal on nape; snout and tip of lower jaw dark; a dark line 
at lower part of eye; dorsals light, a dark streak along upper part of 
spinous dorsal; pectorals dusky; ventrals and anal colorless. Length 
200 to 250 millimeters. 
North Pacific, on sandy shores, from Bering Sea to Monterey, Cali- 
fornia, and to Hokkaido in Japan; very abundant northward; burying- 
in the sand. Here described from a specimen from Herendeen Bay, 
Alaska. (U. S. Fish Commission steamer Alhat7'0ss collection.) 
We have seen no Japanese specimens, but Ishikawa records it from 
Hokkaido. 
11. ARCTOSCOPUS Jordan and Evermann. 
Arctoscopus J ORB AiJ and Evermann, Check-List Fishes, 1896, p. 464 {japonicus). 
This genus differs from Tricliodon in the short, high, triangular 
spinous dorsal, which is composed of 10 spines. 
[apKTog^ northern; gkotioz, gazer; for JJranoscopus.) 
i8. ARCTOSCOPUS JAPONICUS (Steindachner) . 
HATA-HATA (FLAPPER). 
Trichodon japonicus Steindachner, Ichth. Beitr., X, 1881, p. 4; Strielok, near 
Vladivostok, Sitka. — Jordan, Cat. Fishes N. A., 1885, p. 117. 
Arctoscopus japonicus Jordan and Gilbert, Kept. Fur Seallnvestig., Ill, 1898, v>. 
479; Iturup Island, Kurile Group. — Jordan and Evermann, Fish. N. and M. 
Amer., Ill, 1898, p. 2297, fig. 867; Iturup Island. 
Head 3f in length, depth 3f ; depth of caudal peduncle 3f in head; 
eye 3i; snout If; interorbital space 6|; D. X. 13; A. 31. 
Body deep, greatly compressed, the caudal peduncle narrow. Head 
rather large, the top flat, the sides sloping inward toward the ventral 
part; bones of head thin, cavernous; eye large, its diameter greater 
than length of snout; interorbital space flat, equal in width to pupil; 
preorbital narrow. Mouth almost vertical, the maxillary extending 
about to center of pupil, its length contained about 2 times in head; 
premaxillar}^ protractile; teeth on jaws small, in narrow bands; a 
