BULLETIN OF THE UNITED STATES FISH COMMISSION. 445 
Scomberomorus cavalla Jordan, Proc. U. S. Nat. Mus., 119, 1884 (Key West); Jordan, 
Ball. U. S. Fisli Comm., 77, 1884 (Key West ; no description) ; Meek & New- 
land, Proc. Acad. Nat. Sci. Phila., 235, 1884; Collins, Ball. U. S. Fisli Comm., 
359, 1885; Jordan, Cat. Fisli. N. A., 68, 1885; Jordan, Proc. U. S. Nat. Mus., 
36, 1886 (Havana; no description); Jordan, Proc. U. S. Nat. Mus. , 574, 1886, 
(West Indies; no description). 
Habitat .— Warm parts of the Atlantic; north to Wood’s Holl; south 
to Cuba, Brazil, and west coast of Africa. The specimens examined by 
us are from Havana and Key West. 
Etymology: The Spanish name, from caballus, ahorse (horse-mackerel.) 
In the West Indies and about Florida it is one of the best food-fishes, 
reaching a large size and having flesh of excellent quality. It reaches 
a weight of 40 to 100 pounds, and a length of 3 to 5 feet. 
We follow Meek & Newland in using the original orthography cavalla. 
Genus VIII — ACANTHOCYBIUM. 
Acanthocybium Gill, Proc. Acad. Nat. Sci. Phila., 125, 1862 ( sara ). 
Type: Cybium sara Bennett = Cybium solandri Cuv. & Val. 
Etymology: axavffa = spine, zuptov = t he cured flesh of the pelamis, 
or the pelamis itself when at a particular age. 
This remarkable genus indicates a long step from the type of Scorn- 
beromorus toward the type of the sword-fishes. The single species 
ranges widely in the warm seas. 
ANALYSIS OF SPECIES OF ACANTHOCYBIUM. 
a. Body elongate, fusiform ; premaxillaries iu front produced in a sort of beak, which 
is nearly half the length of the snout ; teeth in jaws strong, serrated, enlarged 
posteriorly, about 50 in each jaw; corselet small; spinous dorsal very long ; 
second dorsal and anal short and low ; anal inserted behind the vertical from 
the soft dorsal; pectorals 2£ in head; lateral line descending abruptly beneath 
the 16th spine. Color of back dark steel blue, paler underneath ; indistinct 
vertical bands of young disappear with age. Head, 4; depth, 6-£. D. xxvi — 
12— vm ; A. 12— ix Solandri, 15. 
15. ACANTHOCYBIUM SOLANDRI. 
(Wahoo, Peto.) 
Cybium solandri Cuv. & Val., viii, 192, 1831. 
Acanthocybium solandri Jordan, Proc. U. S. Nat. Mus., vii, 119, 1884 (Key West); Jor- 
dan, Bull. U. S. Fish. Comm., 77, 1884 (Key West; no description); Jordan, 
Cat. Fishes N. A., 68, 1885 (Cuba; Key West) ; Jordan, Proc. U. S. Nat. Mus., 
574, 1886 (West Indies; no description); Jordan, Proc. U. S. Nat. Mus., 36, 
1886 (Havana; no description). 
Cybium sara Bennett, “Beechey’s Voyage, Zook, 63, pi. 20, f. 2, 1849” (Loo-Choo); 
Gunther, ii, 373, 1860 (after Bennett). 
Cybium petus Poey, Memorias Cuba, ii, 234, tab. 16, f. 1, 1860 (Havana). 
Acanthocybium petus Poey, Synopsis, 363, 1868; Poey, Enumeratio Pise. Cubensis, 73, 
1875; Poey, Proc. U. S. Nat. Mus., 5, 1878. 
Cybium verany Doderlein, Giorn. di Sc. Nat. ed Econ., viii, 1872 (Palermo). 
