PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 153 



alternating with whitish ; caudal whitish on its anterior third, the rest 

 of the fin having brown on the skin covering the fin-rays ; the pectoral 

 has five brown bands; the anal is all whitish except a dark stripe run- 

 ning through near its middle ; the ventrals are whitish. 



Gymnacanthus galeatus, n. 8. 



Museum catalogue number 28097; collector's number (1003), Five 

 individuals were caught on a trawl-line at Iliuliuk, Unalashka, July 30, 

 1880, for Messrs. Dall & Bean, by Sylvanus Bailey. 



As these specimens differ in several important details from our ex- 

 amijles of G. pisUlMger from the Atlantic and from Siberia as well, I will 

 briefly indicate the differences and call attention to them by giving the 

 species a new name. 



The smallest example is 7f inches long ; the largest, lOJ inches. 



Br. YI; D. XI, 16-17; A. 19; V. I, 3; P. 19-20. 



No vomerine teeth. Two small spines above the snout ; a small tuber- 

 cle at the upper posterior margin of each orbit. Four preopercular 

 spines, the upj^er as long as the short diameter of the eye, bearing two 

 or three antler-like processes. The space between the eyes is deeply 

 concave and compleiely covered by aggregated bony granulations, as are 

 also the crown and the neck. Similar bony granulations are at the hind 

 margin of the orbit, on the suborbital ridge, and on the opercles. The 

 body is naked. The pectorals and, in males, the ventrals reach beyond 

 the origin of the anal ; in females the ventrals do not reach the vent. 

 Dorsals and pectorals with interrupted black bands as in G. pistiUiger ; 

 ventrals and anal uniform whitish ; back with four distinct brown spots, 

 the longest nearly twice as long as the eye, extending a little below the 

 lateral line, and there blending into an interrupted wavy brown lateral 

 stripe. The maxilla extends to below the middle of the eye. The great- 

 est height of the body is contained, tivice in the length of the head., and 7J 

 times in the total length including the caudal. Pectoral as long as the 

 head without ihe snout, its upper axil immediately under the beginning 

 of the spinous dorsal. 



Gymnacanthus galeatus may be at once distinguished from G. pistilliger 

 by its longer and more bony head and its elongate form. I have com- 

 pared it with specimens of G. pistilliger from Norway, Cumberland Gulf, 

 and Eastern Siberia. 



Hemilepidotus Jordaui, n. s. 



Museum number 27598; collector's number (1602). 



Length of larger type, 13 inches ; smaller, 10^ inches. 



Taken at Iliuliuk, Unalashka Island, on a trawl -r.ne, by Sylvanus 

 Bailey, July 30, 1880. 



Larger, D. X, i, 21 ; A. 17 ; Y. i, 4. 



Smaller, D. X, i, 21 ; A. 10 ; Y. i, 4. 



The dorsal band of scales contains 4 rows at the widest part (6 rows 

 in spinosus). 



