57. SCOMBERESICID^E - TYLOSURUS. 373 



to the caudal keel, on which the genus was originally based, a character 

 of little importance.) 



a. Caudal peduncle not keeled. 



b. Posterior rays of the dorsal prolonged, longer than the anterior rays. 



596. T. laians (C. & V.) J. & G. 



Olive green above, silvery below, sides with a row of obscure dusky 

 blotches in the young ; posterior portion of dorsal fin black. Snout a 

 third longer frhan the rest of the head. Maxillary hidden by the pre- 

 orbital. Dorsal beginning opposite front of anal, its posterior rays much 

 elevated, their tips reaching beyond base of caudal. Anal fin slightly 

 falcate, the last rays very low. Tail compressed, deeper than broad. 

 Head 3 in length. D. 26 ; A. 27. Virginia to the West Indies and the 

 west coast of Mexico, occasional on our coast. 



(Bclone hians Cuvier & Valenciennes, xviii, 432: Belone hians Giinther, vi, 248.) 



bb. Middle and posterior rays of dorsal short, subequal. 



c. Dorsal and anal long, each with more than 20 rays. 



597. T. latisnusaus (Poey) J. & G. 



Green above, white below. Head and body elongate. Eye 10 in 

 head. Beak twice as long as the rest of the head. Pectoral rather 

 long and pointed, broader and shorter than in T. longirostris. Bones 

 not green. Caudal forked. B. 24; D. 24; A. 25. Cuba; occasional 

 on our Atlantic coast. (Buzzard's Bay; Goode.) 



(Belone latimana Poey, Mem. Cnba, ii, 292, 1860: Belone latimanus Giinther, vi. 249: 

 Btlone latimana Goode, Proc. U. S. Nat. Mus. 1878, 6.) 



cc. Dorsal and anal shorter, each with less than 20 rays. 



d. Tail compressed, deeper than broad. 



T. iiotatus (Poey) J. & G. 

 Green above, yellow below; vertical fins bluish, their tips tinged 

 with orange. Free portion of tail compressed, deeper than broad. 

 Head flat above, with deep scaly median groove. Superciliary region 

 striated. Base of premaxillaries depressed ; maxillary hidden by the 

 preorbital. Teeth moderate, wide-set; no vomeriue teeth. Eye less 

 than interorbital space, f the postorbital part of head. Body broad, 

 subcylindrical. Pectoral as long as postorbital part of head ; ventrals 

 very small; anal scaly at base; caudal slightly eniargiuate. Scales 

 rather large. Head 2 J. D. 13; A. 14. (Giinther.) West Indies, north 

 to West Florida. 



(Btlone notata Poey, Mem. Cuba, ii, 293, I860: Belone notata Giinther, vi, 248: Belone 

 notata Goode & Beau, Proc. U. S. Nat. Mus. 1879, 151.) 



dd. Tail depressed, broader than deep. 



