14 PROCEEDINGS OF THE ACADEMY OF [Jail., 



edge and caudal base, simple ray about f length of first branched 

 ray which longest, fin thus reaching slightly nearer caudal base 

 than last depressed dorsal or anal rays. Vent close before anal. 



Color in alcohol with back and upper surfaces dull brownish, 

 sides and below silvery-whitish, also iris. Muzzle pale, and broad, 

 dull blackish streak on chin to front of branchiostegals. Dorsal 

 and caudal pale brownish, ends of long front rays of former black- 

 ish. Anal whitish. Pectoral with membranes largely blackish, 

 lower face of fin with silvery tinge, inner edge whitish and at point 

 near basal f pale cross-bar half way from upper edge. Ventral 

 largely blackish medially, edges and end broadly whitish. 



Length about 92 mm. (Caudal tip damaged.) 



Type, No. 7,485, A. N. S. P. St. Martins, West Indies. Dr. 

 R. E. Van Rijgersma. 



Only the type known. This species is allied with Cypselurus 

 vinciguerrcB, but differs in the uppermost or elongate simple ray 

 of the pectoral being provided with a broad membrane. 



('Yxsp, over; icziov, sail; with reference to the structure of the 

 pectoral fin.) 



Cypselurus speculiger (Valenciennes). 



Atlantic Ocean. 



Cypselurus nifipinnis (Valenciennes). 



Exocoetus acylla Cope, Trans. Amer. Philos. Soc. Phila., (n. s.) XIV, 1871, 

 p. 481. Tobasco, Mexico. 



No. 7,500, A. N. S. P., type of E. scylla Cope. 



Cypselurus heterurus (Raflnesque). 



St. Martins, West Indies. 



Cypselurus lutkeni (Jordan and Evermann). 



Exucatus hdkoii Jordan and Evermann, Bull. U. S. Nat. Mus., No. 47, 

 I, 1896, p. 736. "Cape San Antonio, Cuba." (Evidently erroneous.) 



No. 7,502, A. N. S. P., type of E. lutkeni Jordan and Ever- 

 mann. 



Cypselurus furcatus (Mitchili). 



Atlantic Ocean and Newport, R. I. 



Cypselurus bicolor (Valenciennes). 



S. Lat. 18° 20' 5" W. Long. 34° 5'. 



Cypselurus nigricans (Bennett). 



Sea Isle City, N. J. 



