A 
F'ishes of Massachusetts. 351 
compactness: fin fifteen inches high; five inches 
long: nine finlets, color of the dorsal; and, like 
them, the middle longest. 
The Caudal fin is lunated: seven inches high in 
its middle; measuring two feet five inches across its 
extremities. At its base, a lateral carina, which is 
continued on to the tail, seven inches long ; one and 
a half inches high. On each side of the portion of it 
which is upon the tail, two smaller carinz are situated 
three inches in length, between which and the 
former, depressions are thus produced. 
The fin rays, so far as could be counted, are 
about as follows: D. 14—13; 9 finlets; P. 34; V. 
1-5; A. 2-12; 9 finlets ; C. 19. 
Preuamys. Cuv. 
Generic characters. Distinguished from the Tun- 
nies solely by their separate, pointed, and. strong 
teeth. 
P. sarda. Bloch. The Skip Jack. 
Trans. Lit. et Philosoph. Soc. N. Y. 428. 
Cuv. et Valenc. Hist Nat. des Poiss. t. viii. p. 149, pl. 217. 
'This species is by our fishermen incorrectly called 
* Bonito.” The true “ Bonito” is a “'Thynnus,” 
Cuv. I have examined two fine specimens of this 
fish ; one, nineteen inches long, was sent me by Dr. 
Yale, from Holmes Hole. He informs me, that for 
the last six or eight years, this species has been fre- 
, quently met with at the Vineyard, and is readily 
