CIIAULIODUS DENTATT'S. 273 



the upper series, and in the lower there are sixty-four to sixty-seven, fifty- 

 three to fifty-four of which are from tlie hj'oid to the vont, or twenty- 

 nine to thirty of which are from the hyoid to the ventral. A peculiiir 

 feature seen in the hranchiostegal series of C. Sloaiii, not patent in that of 

 C. barbains, is the .apparent change in the functional direction of the' sixth 

 to the thirteenth light facets from outward and downward to within the 

 mouth at the side of the hyoid, and the appearance helow them in the 

 hranchiostegal membrane of a series of very small facets as if to con- 

 tinue the series as seen from the outside and from below. The narrow 

 pectorals, the deeper notch in the chin and the backward position of the 

 dorsal by themselves serve to distinguish C barbatus from either C. Shani 

 or C. dentatus. 



station Latitude. 



3359 6° 22' 20" N. 



3375 2° 34' N. 



3376 3° 9' N. 



Chauliodus dentatus sp. n. 



Br. r. 20; D. 6 ; A. 13; V. 7; P. 14-15; LI. 64. 



This is one of the more elongate species of the genus. It is much more 

 slender than Chauliodus barbatus sp. n., has not so large a notch on the chin, 

 has the dorsal nearer the head, has a broader pectoral, has a longer caudal 

 region, and has larger numbers of luminous organs in the two main series. 

 It has a smaller eye, a wider pectoral fin, and a longer body than C.pammelas 

 Ale. ; it has a longer anal fin, and a longer lateral line than C. Maccouni 

 Bean ; and it has a longer anal fin and a longer caudal region than 

 C. S/oani Bl. Schn. 



Form slender and compressed ; depth of head about one ninth, length 

 of head about one eighth, and length of the caudal region somewhat less 

 than one fifth of the entire length. The distance from the snout to the 

 ventrals is a little less than half of that from the snout to the anal fin. 

 The orbit is about two ninths, and the longest mandibular fang is nearly 

 one half as long as the head. Crown convex; profib decidedly concave in 

 front of the eye. The short compressed maxillary teeth are stouter and 

 less numerous than those of C. barbatus ; they are stouter and more erect 

 than those of C. Sloaui. The hinder of the luminous glands below the eye 

 is not so far backward from the orbit as that on C. harJjatus. On the latter 



18 



