Jordan and Evermann. — Fishes of North America. 2297 



Drachinus trichodon, Tilesius, Mem. Acad. St. Petersburg, iv, 1811, 40G; uame only. 



Traehiniis gasteropelecus, Tilesius, I. c, 466, 1811, Kamchatka. 



Trichodon stelUri, Cuvier & "Valenciennes, Hist. Nat. Poiss., in, 154, pi. 57, 1829 ; based on 

 Ti-achinus trichodon Pallas ; Gunther, Cat., ii, 251, I860; Jordan & Gildert, Synop- 

 sis, 627, 1883. 



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

 A. 28; P. 23. 



851. ARCTOSCOPUS, Jordan & Evermann. 



Arcloscopus, Jordan & Evermann, Check-List Fishes, 464, 1896 (japonieiis) . 



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

 dorsal which is composed 01 10 spines. {apKro<i, northern ; 6ho7c6s, gazer; 

 for Uranoscopits.) 



2633. ARCTOSCOPUS JAPOMCCS (Steindachucr). 



Head 3|; 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 louger 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 tricJiodon, but the mouth rather more oblique. Length 

 4i inches. North Pacific; scarce. Eecorded from Strietok, in the Sea of 

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

 Iturup Island (Kurils). {japonicus, from Japan.) 



Trichodon japonicus, Steindachner, Ichth. Beitr., x, 4, 1881, Strietok ; Sitka ; Jordan, Cat. 



Fishes N. A., 117, 1885. 

 Arctoscopns japonicus, Jordan <fe Gilbert, Eept. Fur Seal Investig., 1898. 



Family CXCVI. DACTYLOSCOPID^. 



(The Sand Stau-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 altove; eyes 

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

 bony stay connecting with the preopercle; nostrils double; opercles 

 fringed; month nearly vertical; premaxillaries protractile, not forming 

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

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

 pseudobranchiai 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; vertebra- more than 10 + 14; pyloric ca'ca none. 

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

 3030 67 



