76 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



The type was cut in two by the dredge, and only the anterior part of 

 the specimen is present, but this is in good condition and seems to represent 

 a new form. 



Measurements of the holotype in mm. — Head 16, head and trunk 93, 

 eye 1, snout 3.4, cleft of mouth 3.75, interorbital 1.2. 



Description. — Cleft of mouth 4.26 in head, snout 4.76. Eye 3.4 in 

 snout, 16 in head. Body elongate and cylindrical, no evidence of any fins 

 present. Gill openings inferior; they are curved (convex side anteriorly) 

 in the form of a quarter-segment of a circle; the medial end of each slit 

 is transverse, the posterior end horizontal. Isthmus very narrow, one-half 

 diameter of eye. Dorsal outline of snout curved downward, ventral 

 border of snout straight. Dorsally tip of snout broadly rounded. Eye 

 nearer the angle of the jaws than tip of snout, just posterior to the sym- 

 physis of the lower jaw. A shallow groove above and paralleling the upper 

 lip, from the posterior nostril backward, fading out before the end of the 

 gape. 



Anterior nostrils tubular, set in a pit; opening of the tube hourglass 

 shaped, formed by two opposed papillae projecting into the opening. 

 Posterior nostril a rounded pore without a raised rim, set above the edge 

 of the lip on the outside of the mouth, at the anterior end of the groove 

 which parallels the edge of the upper lip. Maxillary teeth uniserial, 

 small, slender, close set, and recuned. Vomerine teeth uniserial, some- 

 what larger at the head of the shaft. Premaxillary teeth four, two on a 

 side at the sj'mphysis of the upper jaw. Mandibular teeth uniserial, simi- 

 lar to the maxillary teeth, except that anteriorly a few of the teeth are 

 slightly enlarged. Gular region with faint longitudinal folds; jugoste- 

 galia evident. Lateral line curved upward anteriorly over the opercular 

 apparatus. 



Body color light cream with no dark markings of any kind. The snout 

 and the anterior part of the head are somewhat lighter in color. 



In comparison with a specimen of C. selachops of almost the same 

 diameter and of what we judge to be almost the same size, we find that 

 the snout of equatorialis is a great deal heavier, blunter, and more broadly 

 rounded from the dorsal aspect. The eye is farther forward on the head, 

 the head much shorter, and the lower jaw is broader and not so long and 

 pointed. In equatorialis the mouth is smaller, and the position of the pos- 

 terior nostrils is above the outside edge of the upper lip and not under it 

 as in selachops. The anterior nostrils are set in a pit and not on the sur- 

 face, and the tip of the snout is not black. 



