190 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
2. Decapterus scombrinus (Valenciennes) Jordan & Gilbert. 
Caranx scombrinus Valenciennes, Voyage de la Vénus, 1846, 332, pl. 7, f. 1, 
(Galapagos Islands); Giinther, ii, 426. 
Habitat.—Galapagos Islands. 
We have not seen the original description of this species. There is 
nothing in the short account given by Dr. Giinther to indicate that it 
is distinct from D. punctatus. 
3. Decapterus sanctz-helenz (Cuvier & Valenciennes) Poey. 
Caranz sancte-helene Cuvier & Valenciennes, ix, 37, 1833 (St. Helena). 
Decapterus sancte-helene Poey, Syn. Pisce. Cubens., 1868, 368 (Cuba); Poey, 
Enum. Pisc. Cubens., 79. 
Habitat.—Tropical parts of the Atlantic; St. Helena; Cuba. 
This species is unknown to us. According to Poey it differs from D. 
punctatus in having its scutes subdenticulate, less narrow, and begin- 
ning much behind the origin of the anal. 
4. Decapterus hypodus Gill. 
Decapterus hypodus Gill, Proc. Ac. Nat. Sci. Phila., 1862, 261 (Cape San 
Lucas); Jordan & Gilbert, Proc. U. 8. Nat. Mus., 1882, 358. 
Habitat—Cape San Lucas. 
Four specimens of this species are known, all obtained by Mr. Xantus 
at Cape San Lueas. It is probably a subspecies of D. macarellus, as 
already noted by us, the differences being of minor importance and of 
doubtful permanence. 
5. Decapterus macarellus (Cuvier & Valenciennes) Gill.—Anfonino. 
Caranz macarellus Cuv. & Val., ix, 40, 1833 (Martinique) ; Giinther, ii, 426. 
Decapterus macarellus Poey, Enum. Pise, Cubens., 79; Jordan & Gilbert, Syn. 
Fish. N. A., 1883, 433. 
Habitat.—W est Indies, occasionally northward to Cape Cod; rare on 
the coasts of the United States. 
GENUS 2.—TRACHURUS Rafinesque. 
TRACHURUS Rafinesque, Indice d’ Ittiol. Siciliana, 1810, 20 (trachurus, ete.). 
TracHuuRuS Cuy. & Val., ix, 6, 1833 (trachurus). 
Type SCOMBER TRACHURUS L.=TRACHURUS SAURUS Raf. 
ANALYSIS OF AMERICAN SPECIES OF TRACHURUS. 
a. Body elongate, little compressed, the depth 5 in length; scutes about 96 (50+ 46 
to 48) in number, the height of the anterior scutes one-third that of the posterior 
and about 2} in diameter of eye; curved part of lateral line scarcely shorter than 
straight part; maxillary 23 in head, reaching just beyond vertical from front of 
eye; lining of opercle scarcely blackish....-.-..-.-..----..----- PICTURATUS, 6, 
aa. Body comparatively deep and compressed, the depth 4 to 4} in length; scutes 
about 72 (34 to 36 + 36 to 38) in number, the anterior scutes scarcely lower than 
the posterior, their height about 1} in diameter of eye; length of curved part of 
lateral line 13 to 13 in straight part; maxillary reaching past front of pupil, 24 
to 24 in head; lining of opercle blackish......-...-....-- 6 ee SAURUS, 7.. 
