Jordan and Evermann. Fishes of North America. 2297 



Drachinus trichodon, TILESIUS, Meni. Acad. St. Petersburg, iv, 1811, 406; name only. 



Trachinus gasteropelecus, TILESIUS, I. c., 466, 1811, Kamchatka. 



Trichodon stelleri^CvviKR & VALENCIENNES, Hist. Nat. Poiss., in, 154, pi. 57, 1829 ; based on 



Trachinus trichodon PALLAS; GUNTHER, Cat., n, 251, I860; JORDAN & GILBERT, Synop- 



sis, 627, 1883. 

 Trichodon lineatus, AYERS, Proc. Ac. Nat. Sci. Phila. 1860, 60, San Francisco; D. XV-18; 



A. 28; P. 23. 



851. ARCTOSCOPUS, Jordan & Everniann. 



Arctoscopus, JORDAN & EVERMANN, Check-List Fishes, 464, 1896 (japonicus). 



This genus differs from Trichodon in the short, high, triangular spinous 

 dorsal which is composed of 10 spines. (apnro$, northern; dxo7t6$, gazer; 

 for Uranoscopuy.} 



2633. ARCTOSCOPUS JAPONICUS (Steindachner). 



Head 3f ; depth 3f. D. X or XI-13; A. 30 or 31; P. 25. Form of body 

 and coloration of Trichodon trichodon. First dorsal high, triangular, the 

 spines slender, separated by a long interval from the second dorsal. Pre- 

 opercle with 5 sharp spines ; the 2 spines on the preorbital very small. 

 Pectoral well developed, all its rays simple, the lower a little thickened, 

 the fin considerably longer than the head and reaching past the last spine 

 of the dorsal ; anal fin with its rays gradually longer posteriorly. Denti- 

 tion as in Trichodon trichodon, but the mouth rather more oblique. Length 

 4| inches. North Pacific ; scarce. Recorded from Strietok, in the Sea of 

 Japan, and Sitka, Alaska, by Steindachner, and by Jordan & Gilbert from 

 Iturup Island (Knrils). (japonicus, from Japan.) 



Trichodon japonicus, STEINDACHNER, Ichth. Beitr., x, 4, 1881, Strietok ; Sitka ; JORDAN, Cat. 



Fishes N. A., 117, 1885. 

 Arctoecopus japonicus, JORDAN & GILBERT, Kept. Fur Seal Investig., 1898. 



Family CXCVI. DACTYLOSCOPIES. 

 (THE SAND STAR-GAZERS.) 



Body oblong, low, compressed posteriorly, covered with moderate, 

 cycloid, imbricated scales ; lateral line complete, anteriorly running along 

 side of back, posteriorly median ; head oblong, nearly plane above ; eyes 

 small, superior, well forward; suborbital bones enlarged, but without 

 bony stay connecting with the preopercle; nostrils double; opercles 

 fringed; mouth nearly vertical; premaxillaries protractile, not forming 

 the entire edge of the upper jaw; lips fringed as in Uranoscopidcu ; gill 

 openings very broad, the membranes separated and free from the isthmus, 

 pseudobranchiae present or obsolete. Dorsal fin very long, continuous or 

 divided, several of the anterior rays spinous ; anal very long, commencing 

 close behind the vent, which is near the breast ; caudal diphycercal, free 

 from dorsal and anal ; pectorals variable, the base broad and procurrent ; 

 ventrals jugular, I, 3; vertebrae more than 10 + 14; pyloric caaca none. 

 Genera 4; species about 10; small fishes living on sandy shores of tropical 

 3030 67 



