1886.] PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 347 



Head, 2| in length ; depth, 7 in head ; breadth, at pectoral, 8 in head. 

 D. 1, 15 ; A. 1, 17. Lat. 1. 225. Scales before dorsal, about 150. Length 

 of specimen, 13 inches. 



This species has been well described in the Proc. U. S. Xat. Mus. 

 under the name of Tylosurus sagitta. Examination of five specimens 

 from Key West shows some variation in the size of the eye, as follows: 



Contrary to the usual rule, the eye seems to be proportionately smaller 

 in the younger specimens. 



Depth of body at pectoral, If in postorbital part of head; breadth 

 at pectoral, 2; caudal subtruncate, the lower lobe produced, longer 

 than postorbital part of head. 



This small species is rather scarce in the waters about Key West. 

 We have seen no specimens from any other locality, but there seems to 

 be good reason for believing that its range extends throughout the West 

 Indies. 



Belone suhtruncata of Poey agrees well with our specimens. The eye 

 (2^ in postorbital part of head) is too small for T. euryops. 



The type of Belone depressa Poey is in the National Museum. This 

 has been compared with the tj^pes of T. sagitta, by Dr. Bean, who in- 

 forms me that they are identical. 



It is possible that Marcgrave's figure of the Timucu, or Usox brasilien- 

 sis* L., belongs to this species, but of this there can be no certainty. 



5. Tylosurus euryops. 



Tylosurus euryops Bean & Dresel, Proc. U. S. Nat. Mus. 1884, 168 (Jamaica); 

 Jordan, Proc. U. S. Nat. Mus. 1886, 35 (Havana). 



Habitat. — West Indian Fauna ; Cuba, Jamaica. 



Head, 2i\; depth, 6 in head ; breadth, 7. D. 1, 15; A. 1, 17. Lat. 1, 

 about 200. Scales before dorsal 140. Length (958, Havana), 12^ 

 inches. 



Body slender, more robust than in T. subtrnncatus, not at all com- 

 pressed, scarcely deeper than broad, except at base of caudal; no keel on 

 caudal peduncle, the lateral line not black, and not more conspicuous 

 there than elsewhere. 



Jaws slender, long, the upper jaw from eye contained 4^ times in 

 length, and If times the length of the rest of the head. Mouth capable 



* The following is the Linnsean description: "Brasiliensis, 8. E. maxilla inferiore 

 longissima, corpore serpentine. D. 12, P. 10, V. 6. A. 17, C. 16. 



'^Mai-cgr. iras., 168, Timucu, Brown, jam. 443, T. Ab, f. 2. Esox maxilla inferiore 

 producta. 



"Habitat in America austraU." 



