364 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 42. 



little past vent. Disk small, deeply cupped, appearing somewhat 

 triangular in the larger individuals; vent close behind disk. (Fig. 4.) 



Multifid prickles scattered over head and body, absent on lips and 

 chin, few or none near the caudal. 



Sldn transparent, finely dusted with dark brown dots, body dusky 

 along the back, abdomen silvery, lower half of eye and peritoneum 

 silvery. 



In appearance this species resembles C. trachysoma, but can be 

 distinguished by the color of the peritoneum, the sliorter pectoral 

 lobe, and the larger disk. 



Four cotypes were taken \vith the type. 



13. CAREPROCTUS TRACHYSOMA, new species. 

 Plate 44, fig. 1. 



Type.—Csit. No. 73333, U.S.N.M. A male, 266 mm. long, from 

 station 4982, in the northern part of the Japan Sea; depth 390 

 fathoms. 



Measurements in hundredths of length mtliout caudal (243 mm.): 

 Length of head 22.2; gi-eatest width of head at cheeks 14; interocular 



width 12; width at angles of 



\>\\\\Vy-; - niouth 11; distance from tip of 



snout to front of orbit 7.1; di- 

 ameter of e^'e 5; distance from 

 tip of snout to end of maxillary 

 11 ; length of gill slit 6.5; great- 

 est depth of body (not including 

 vertical fins) 30; distance from 

 tip of snout to front of anal fin 

 32.5; to front of disk 11.3; to 

 anus 14.5; to front of dorsal 

 25.5; diameter of disk 2.3; distance disk to anus 1.5; longest pecto- 

 ral ray of upper lobe 16; of lower lobe 23; shortest ray in notch 8. 

 Dorsal 60; anal 55; pectoral 31 (fin counts from cotype). 

 Body deep and compressed. Head short, deep, compressed, tlie 

 anterior profile steep, the sides vertical. Snout short, blunt, rising 

 rapidly, not projecting; upper jaw slightl}^ protruding beyond the 

 lower; nostril in a short tube in fi'ont of eye, below level of pupil. 

 Mouth broad, with considerable lateral cleft, the maxillary reaching 

 vertical from behind pupil. Teeth simple, short, in narrow bands. 

 Gill slit extending down in front of five pectoral rays in type ; in some 

 of the cotypes not extending down so far in front of the fin. 



Origin of dorsal above opercular flap, the rays increasing gradu- 

 ally in length and buried in a gelatinous tissue. Caudal truncate or 

 slightly rounded, of eight rays, joined to anal for nearly half its 

 length; dorsal and anal connected to caudal abruptly, but there is no 



Fig. 5. — Relative size and position of vent and 



DISK OF CAREPROCTUS TRACHYSOMA. 



