1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM 371 



the fifth ray is the lougest, its length, in the feuuile, equaling that of 

 the postorbital part of the head. lu the male the dorsal rays are some- 

 "what longer. The base of the dorsal is equal in length to the postorbi- 

 tal part of the head, and is one-half the greatest height of the body. 



The anal is inserted under the seventh or eighth ray of the dorsal. 

 Its longest ray is about two- fifths the length of the head. 



The pectoral is inserted below the middle of the body, its ui^per edge 

 being on a level with the lower border of the orbit; its length is con- 

 tained five and a third to six times in total to base of caudal. 



The ventral is inserted midway between the tip of the snout and the 

 end of the scales. 



The caudal is truncate, with the external rays slightly rounded. 



The head is one-fourth of the total length, including caudal, and 

 equals depth of body at the dorsal origin. 



D. 13-14; A. 15-1 G; scales 15-35. 



Coloration in spiriis. — Olive brown above, lighter below; the opercle 

 silvery, overlaid below with orange; the abdomen with a yellowish 

 tinge; lips dusky; iris pale; scales of upper half of body dusky at base; 

 lower half of body with numerous dark spots, the largest about as long 

 as the pupil. 



Cliaracodon biliiieatus, n. sp. (PI. XX, f. 2.) 



The type of this species is a siu.^le example, number 37832, measuring 

 1^0 inches in length. It resembles the preceding species, number 37<S09, 

 l)ut has a smaller eye and greater number of dorsal rays, larger scales 

 and different coloration. 



In form the species resembles G. lateralis Gthr. The head is broad 

 and depressed, the interorbital space being nearly flat, and the nape is 

 moderately arched. The snout is short, rather shorter than the eye, 

 and the lower jaw is somewhat prominent. The jaws are stout, as in 

 C. lateralis. Tlie upper jaw is moderately protractile. There are about 

 20 bicuspid teeth in the outer series of the lower jaw, and about as many 

 in the ui)per jaw. The villiform teeth behind the incisors can readily 

 be made out. The mandible is nearly vertical when the mouth is closed ; 

 it does not nearly reach to below the eye. Its length is about equal to 

 that of the eye, which is one-fourth as long as the head, and scarcely 

 more than one-half the width of the interorbital space. 



The scales on the top of the head are somewhat enlarged. The oper- 

 cle is connected by membrane to the shoulder girdle, beginning at a 

 point slightly above the upper edge of the pectoral. 



The insertion of the dorsal is midway between the posterior mar- 

 gin of the eye and the end of the scales. The first dorsal ray is slender, 

 articulated, and shorter than the second. The longest dorsal ray is 

 about two-thirds as long as the head. The base of the dorsal is equal 

 in length to the head without the snout, and is contained five times in 

 the total without caudal. 



