l^«5.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 65 

 sAJ-AA-yia 



Vol. VIII, T¥o. 5. IVai^hiiij^ton, D. C. Aprif-^S, 1 885. 



16. Exocqetus callopterus. 



Exocoeins callopterus, Gunther, vi, 1866, 292 (Panama) ; Gunther, Fishes Cen- 

 tral Amer., 1869, 479, pi. 83 (Panama) ; Liitken, Viflensk;. Meddel. Naturh. 

 Foren , 1876, 401, 107 (Panama). 



Exoccetus calopteruH, Jordan & Gilbert, Bnll. U. S. Fish Comra., 1882, lO'.J 

 (Panama). 



Habitat. — Pacific coast of tropical America; Panama. 



This species was found in some abundance at Panama by Professor 

 Gilbert. It is one of the most strongly marked forms, readily distin- 

 guishable from other American species by the color of the pectorals. 

 It needs further comparison with certain East Indian species which 

 have the pectoral lins similarly marked. 



17. ExoccBtus gibbifroiis. 



Exocmtus (jibbifrons, Ciiv. &, Val., xix, 1846, 118 (Atlantic). 



Habitat. — Atlantic Ocean, I^Tewport, K. I. 



The description of Cuv. & Val. is very imperfect, and their species has 

 not been recognized by any subsequent author. It is said to be "dis- 

 tinguished by the ])rominence or convexity of that part of the head be- 

 fore the eyes '' ; " the muzzle is, besides, short, not concave, but rather 

 convex on the superciliary region." 



These characters well distinguish a species represented, in the muse- 

 um of the Philadelphia Acade^uy, by a specimen 8 inches long, collected 

 at Newport, li. I., by Samuel Powell. 



This species has not been noticed by any recent author, and for it we 

 adopt, for the present, the name of E. gibbifrons. Tlie following is a 

 detailed description of this specimen : 



Head 4 in length to end of last caudal vertebra ; depth. oi. D. 12, A. 9. 

 Lateral line about 46 ; length of specimen 8 inches. 



Body robust, little compressed. Head rather short, interorbital area 

 slightly concave, about ^ wider than eye ; profile of snout convex, de- 

 scending more abruptly than in any other of our species, making a de- 

 cided curve downward. Snout rather blunt, 4 in head ; eye 3 in head ; 

 maxillary 4i in head; pectoral fins rather broad and long, their length 

 IJ in length of body; tips of pectorals reaching to tips of last rays of 

 dorsal. First ray of pectoral simple, its length 2^ in length of fin ; sec- 

 ond ray simple, about ^ longer than first ray ; third ray divided ; fourth 

 ray longest. 



Origin of ventrals midway between posterior margin of eye and last 

 caudal vertebra; length of ventrals 2.9 in length of body, their tips reach- 

 ing to last ray of anal. 



Origin of dorsal fin far in advance of the anal. Base of anal 1|^ in 

 base of dorsal. Longest rlorsal ray 21 in head, longest anal ray abont 

 Proc. N. M. 85 .5 



