70 NEW FISHES FROM PACIFIC COAST GILBERT. 



Calotomus gen. no v. 



Teeth distinct, equal, imbricated, arraDged in regular oblique rows in 

 both jaws, wholly concealing the dental i^late, to the anterior surface 

 of which they are affixed. Cutting edge of both jaws formed by the 

 outer teeth, the dental plate not reaching edge, and visible only from 

 within. 



Lips double for a short distance only next the angle. Scales on 

 cheeks in one row. Lateral line continuous. Bases of dorsal and anal 

 fins with scaly sheaths. Dorsal spines nine, soft and flexible. Gill 

 membranes broadly joined to the isthmus. 



This genus diflers from Gryptotomus in the distinct and regularly im- 

 bricated teeth, similar in both jaws. Bleeker may have used the name 

 Galliodon in this sense, but the type of Calliodon (C Uneatus) is almost 

 certainly a Scarus^ and the name is therefore not available. 



Type, Calotomus xenodon sp. nov. 



27. Calotomus xenodon sp. uov. 



Body deep, compressed, the depth 2| in length 5 head, 3^; snout 

 short and convex, 2f in head; interorbital width, 4; maxillary, 3|; 

 eye, 2^ in snout. 



Teeth pointed, imbricated in quincunx order, both tips and edges 

 wholly free, the anterior face convex, the posterior face alone adnate to 

 the dental plate. They are of equal size and similar in both jaws, there 

 being three or four teeth in an oblique cross-series anteriorly, about 

 twelve of these series in the upper jaw, and fourteen in the lower. Two 

 teeth in the upper jaw at the angle of the mouth are conical and curved 

 downwards and backwards. 



Scales on cheeks in a single series, three or four in number. Four 

 scales on median line before dorsal fin, the anterior one encroaching on 

 occiput. Scales on breast not reduced, three on median line before 

 ventrals, one and one-half series of scales between lateral line and dor- 

 sal, the half series forming a sheath along base of flu. 



D. IX, 10; A. Ill, 9. Scales 25 ^. 



Dorsal spines rather high and flexible, the origin of fin over base of 

 pectorals. Caudal deeply lunate, the outer rays produced, one-third 

 longer than the middle rays, 1^ in head. None of the ventral rays 

 elongate, the fin reaching about half way to vent, 1| in head. Pecto- 

 rals with wide oblique base, the free margin of fin somewhat /-shaped, 

 the upper angle acute, the lower rounded, the longest ray 1^ in head. 



Color : Mottled silvery, slaty, and brown, without definite pattern. 

 Top of head and snout dusky. Pectorals black at base. Ventrals 

 dusky at tip. Dorsal and anal black on basal half, mottled distally. 

 Caudal mottled, narrowly edged behind with white. 



Two specimens from Socorro Island, the longest 14 inches long. 



