1886.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 355 



17. Tylosurus pacificus. 



Belonejiacijica SteimUchner, Icbtli. Beitr., iii, 65, 1875 (Panama; Acapulco). 

 Tylosurus pacificus Jordan & Gilbert, Proc. U. S. Nat. Mus., 1882, 624 

 (Panama) ; Jordan, Proc. U. S. Nat. Mus., 1885, 370 (Panama). 



Habitat. — Panama Fauna ; Acapulco, Panama. 



This species is the Pacific coast representative of T. acus, from which 

 it is scarcely to be distjiiguished except by the rather stouter body, 

 smaller teeth, and shorter vertical fins. Two or three specimens were 

 found by Professor Gilbert in the markets of Panama. 



18. Tylosurus acus. Hound-fish; Agujon. 



Sphijrcena acus Lac6pede, Hist. Nat. Poiss., v, 180.3, 6, pi. 1, f. 3. (Martinique ; 



from a drawing by Plumier.j 

 Tylosurus acus Bean, MSS. 



fEsox imperialis Rafinesqne, Caratteri di Alcuui Nuovi .Generi, 1810, 59 (Pa- 

 lermo). 

 f Tylosurus imperialis Doderleiu, Prospetto Metodico Pesci della Sicilia, 1879, 



58 (Palermo). 

 Belone caribbcea Giintber, vi, 1866, 241 (Dominica; Jamaica; New Orleans); 



Cope, Trans. Am. Phil. Soc, 481, 18/1 (Lesser Antilles) (not of Le Sueur). 

 Tylosurus caribbceus Jordan, Cat. Fish. N. A., 188.5, 59; Jordan, Proc. U. S. 



Nat. Mus., 1886, 26 (Beaufort). 

 fTylosurus cantrauili Cocco, "Letterein Gioru. Sci. Lett. Sic, xviii, 18, tab. 1, 



f. 4, 1829" (Messina); Bonaparte, Fauna, Ital. Pesc. 

 f Belone cantrainii Cuv. & Val., xviii, 418, 1646 (copied); Giintber, vi, 242 



(copied). 

 Belone latimana Poey, Memorias Cuba, ii, 290, 1861 (Havana) ; Guutber, vi, 



1866, 249 (copied) ; Goode, Proc. U. S. Nat. Mus., 1«78, 6 (Buzzard's Bay, 



Mass.). 

 Belone jonesi Goode, Amer. Journ. Sci. Arts. 1877, 295 (Bermuda) ; Goode, Proc. 



U. S. Nat. Mus., 1878, 462 (Bermuda). 

 Belone jonesi Giintber, Ann. Mag. Nat. Hist, iii, 1879, 150 (Bermuda). 

 Belone hiaus Jordan & Gilbert, Proc. U. S. Nat. Mus., 1878, 383 (Beaufort, N. C. ; 



Young). 



Habitat. — West Indian Fauna. Bermudas, straying northward to 

 Cape Cod, and perhaps crossing the ocean to Sicily. 



It is possible that more than one species is included in the above 

 synonymy, but so far as we can decide, all these names refer to a single 

 species, widely distributed and varying somewhat with age. 



The best description of this species extant is that of Professor Goode 

 under the name oH Belone jonesi^ and his description we may now adopt 

 for this species as understood by us. 



So far as the description goes, the jonesi of Giinther may be either 

 this species or raphidoma, but as Giinther's types as well as Goode's 

 came from Mr. J. Matthew Jones at Bermuda, we may accept, as un 

 questioned, Goode's statement that the two are identical- We have seen 

 that the height of the last dorsal rays is subject to great variation in T. 

 raphidoma, the young as a rule having these rays elevated, as also some 

 old examples, while in others, these rays are short, the tips being ap- 

 parently worn off. According to Dr. Bean, who has compared specimens 

 of T. latimanus with the types of T. jonesi., no other tangible differences 



