264 PROCEEDINGS OF THE ACADEMY OP 



development of the coracoid bones ; abdomen compressed. Dorsal 

 fin behind the line of the ventrals. 



This genns has a considerable resemblance to Chalcinus, and 

 is intermediate between it and Ghalcinopsis, Kner. The former 

 has two series of premaxillary teeth, the latter four; the present 

 possesses three. The Ghalcinopais alhurnus^ Gthr., probably be- 

 longs to Triportheus. 



TRIPOETHEUS ALBUS, Cope, sp. nov. 



Teeth of the premaxillary closely packed, many denticulate ; 

 chin projecting beyond muzzle when the mouth is closed. Radii 

 D. 11; A. 21 ; ventrals longer, extending to beyond the last ray 

 of the dorsal. Pectorals falcate, not quite reaching end of ven- 

 trals. Caudal deeply emarginate. Scales large 1. 1. 28, five series 

 above the lateral line. Head 3.5 times in lenjjth without caudal: 

 orbit large, exceeding interorbital width a little, and three times 

 in length of head (including chin). 



Color dark ashen above, sides and below silver-white; a dark 

 spot at basis of caudal fin. Total length m. .061; length to 

 basis of dorsal fin .0292; from D. I. to basis caudal .02. The 

 dorsal outline of this species is regularly arched. 



From the Ambyiacu. 



TRIPORTHEUS FLAVUS, Cope, sp. nov. 



Premaxillary teeth spaced, the anterior series in contact only 

 exteriorly. When the mouth is closed the chin projects but little, 

 and the profile of the head descends obliquely from that of the 

 back. Latter gently arched. Radii D. 11; C. 20; A. 30; Y.^-, 

 P. 11. Yentrals short, scarcely reaching the line of the last 

 dorsal ray, pectorals sometimes attaining that point. Caudal sub- 

 truncate. Head one-fourth length without caudal, eye 3.25 times 

 in head, equal interorbital space .75 times in muzzle. Depth at 

 ventral fin three times in length. Scales at ventral 6-34-5-3. 



Total length 6.25 inches, = .15*7 m. Length to D. I. .08, to anal 

 .093; to caudal .132; depth at pectoral .044. Color brownish- 

 yellow, with golden reflections; four shaded lines above on the 

 middles of the scale series ; above with steel-blue reflections ; a 

 black band through the middle of the caudal. 



Numerous specimens. In a young one of three inches the 

 caudal fin is deeply furcate, as in C. alhus ; perhaps in larger speci- 

 mens of the latter the tail is also subequal. 



[January 16, 



