466 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. : 
28. COELORHYNCHUS TRIOCELLATUS, new species. 
Type-specimen.—Cat. No. 78218, U.S.N.M.; amale 190 mm. long to 
the end of a pseudocaudal, 65 mm. to the anus; dredged at Albatross 
station 5575, north of Tawi Tawi, at a depth of 315 fathoms, where 
the bottom temperature was recorded as 52.3° F. 
This species, quite handsomely marked for a bathybial type, is 
closely related to both @. notatus and sexradiatus, but resembles 
notatus most. Comparison between these forms has already been 
given in the analytical key to the species of Coelorhynchus, and will 
be repeated in some detail in the course of the following description. 
C’. triocellatus is also related to the following species, which, how- 
ever, lacks the ventral fossa. 
Fin-rays—first dorsal, I, 9; pectorals, 17-16; ventrals, 7-7. 
Fic. 12.—CoELORHYNCHUS TRIOCELLATUS. TYPE. 
The body is slender and comparatively strongly compressed; its 
greatest depth is contained 1.9 times in the head; its width across the 
pectoral bases, 2.5 times, being equal to the depth of the body below 
the origin of the lateral line, or to the total depth of the body 
at a point twice the head’s length behind the tip of the snout; at that 
point the width of the body is contained 3.4 times in the depth. 
The dorsal contour is concave on the snout, but straight on the 
postorbital portion of the head, and horizontal on the tail behind 
the first dorsal fin. The snout in this species is diagnostically long, 
slender, and sharply pointed, with sides but little convex. Its pre- 
ocular length is contained 2.32 times in the head; the preoral length, 
2.45 times; its width opposite front of the orbits, 3.0 times. The pos- 
teroventral angle of the subopercle is produced backward into a 
pointed flap. Length of the orbit, 3.6 in head, 1.05 in postorbital, 1.6 
in snout; least interorbital width, 1.6 in postorbital; least suborbital 
