136 PROCEEDINGS OF THE ACADEMY OF [April, 



their base from the tail" is not clear. Now his figure varies in 

 several respects, and the details are slightly obscure. The dorsal 

 has 26 rays and the anal about 24 ?, the eye about 1| in postocular, 

 first dorsal ray 1^, first anal ray 1 + ^, least depth of caudal peduncle 

 6|, ventral 1^, postocular about 5 in rest of head, pectoral 8f in 

 total head length, lower caudal lobe about 4|, first anal ray 5 and 

 pectoral 7 or 8 times to ventral. 



I have recently examined material sent by the United States 

 National Museum from the Azores and Ascension Island, which I 

 identified as B. trachura Valenciennes and appears in every way 

 identical. It is also quite evident that Belone ardeola Valenciennes 

 and B. cigoneUa Valenciennes are other synonyms. This species 

 is not a Tylosurus as Jordan^ has recently announced, but a Belone 

 belonging to my subgenus Platybelone. 



15. Strongylura timucu (Walbaum). 



{Belone diplolan'.a Cope, Trans. Amer. Philos. Soc. Phila., n. s., XIV, 1871, 

 p. 481.) 



Head 2f ; depth 15; D. ii, 14; A. iii, 15; scales 230 from shoulder 

 to caudal base and 10 more on latter; 155 scales from occiput to 

 dorsal origin; eye 2| in postocular; interorbital 2|; first branched 

 dorsal ray 1|; first branched anal ray 1 ; least depth of caudal peduncle 

 4j; ventral If; postocular 3^ in rest of head; pectoral 4; lower caudal 

 lobe about 4. Body subcylindrical, caudal peduncle slightly de- 

 pressed, width behind slightly less than its depth. Head large, 

 with long slender jaws, lower little longer. Eye large, next to upper 

 profile. Maxillary not quite to pupil, little behind front eye edge, 

 largely concealed. Teeth small. Jaws not completely closing bas- 

 ally. Interorbital depressed, broad, very slightly concave. Nasal 

 cavity little less than pupil. No rakers. L. 1. runs along lower 

 body edge, ascends caudal peduncle at middle of side and then straight 

 to caudal base medially. Head largely scaly, over sides at least, 

 also including preorbital, side of mandible and maxillary. Dorsal 

 origin well behind anal origin or slightly nearer caudal base than 

 ventral origin, front lobe well elevated. Anal like dorsal, little 

 larger. Caudal emarginate behind, lower lobe little longer. Pectoral 

 pointed, 2| to ventral, latter inserted slightly nearer caudal base 

 than hind eye edge, about \ to anal. Color in alcohol faded pale 

 brown on back, sides and lower surface silvery-white. Line of 

 demarcation along back distinct, leaden, and below closely parallel, 



9 Proc. U. S. Nat. Mus., 55, 1919, p. 398. 



