1919.] NATURAL SCIENCES OF PHILADELPHIA. 3 



figure and account by Russell. *S. caudunaculata Van Hasselt 

 was deliberately proposed to avoid tautonomy and replace Belone 

 strongylura Van Hasselt of the preceding year, while both specific 

 names gained usage through the works of Bleeker. The species 

 with large scales and blunt caudal fin may then remain in the sub- 

 genus Strongylura Van Hasselt, while the larger and more finely- 

 scaled species with forked caudals may contain Tylosurus Cocco. 



Strongylura strongylura (Van Hasselt). 



Philippines. 



Strongylura notata (Poey). 



A large series from Florida (Stuart, Boca Grande, Marquesas 

 Keys, Big Pine Key, Hailer's Rock, Boca Chica Key, Bayport. 

 Wes.t Palm Beach and Key West). 



strongylura scapulare (Jordan and Culver). 



Panama. 



strongylura timucu (Walbaum). 



Colon, and Santo Domingo, W. I. 



Strongylura exile (Girard). 



San Diego, Cal. 



strongylura peruana new species. Fig. 1. 



Head, from tip of frontal process, 5j; depth 1| in postocular; 

 D. II, 12; A. II, 14; P. i, 10; V. i, 5; scales about 350 from opposite 

 upper hind edge of gill-opening to caudal base medially; about 

 235 scales between occiput and dorsal origin; eye 2f in postocular; 

 interorbital 2f ; first branched dorsal ray about 1^; first branched 

 anal ray about Ij; pectoral 1; ventral If. 



Body elongate, moderately slender, cylindrical. Caudal pe- 

 duncle cylindrical, or about broad as deep, least depth 1^ in eye, 

 and with slight keel each side behind for lateral line. 



Head level above, flattened sides narrowly constricted below, 

 width if in postocular. Jaws not completely closing basallj^, 

 snout width at eyes long as frontal process. Eye little ellipsoid, 

 close to upper profile though not impinging. Maxillary well 

 exposed, reaches beyond front of eye or half way in front part of 

 iris to pupil. Band of outer teeth in jaws very fine and narrow, 

 and larger inner well spaced. No teeth on mouth roof. Tongue 



