138 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
reaching vertical from middle of eye, its length 3 in head; jaws without teeth in adult; dorsal spines 
separate in adult; dorsal and anal fins falcate, anterior soft rays reaching middle of caudal fin; dorsal 
lobe 1.5, anal 1.75 in length of body; ventrals reaching four-fifths distance to vent, their length 2.4 in 
head; caudal very deeply forked, its lobes nearly half length of body. 
Color, bluish above, golden below; lobes of dorsal and anal very dark; rest of tins pale, with 
bluish edges; caudal bluish; pectorals golden and bluish; ventrals whitish. Body crossed by four 
black vertical bands, first under procumbent spine, second under third dorsal spine, third and fourth 
under soft dorsal; a black spot representing a fifth band on lateral line between last rays of dorsal and 
anal, this sometimes obsolete; the position of the bands appearing to be subject to slight variation. 
Young individuals, 2 inches in total length, may be described as follows: Head 2.9; depth 2.6; 
eye 4; dorsal profile and general form as in adult; anterior dorsal and anal rays not produced; caudal 
less deeply forked. Color, bright-silvery, merging into metallic-bluish on back and yellowish on lower 
sides and belly; the four dark vertical bars very faint, but usually distinguishable with a lens, even in 
very small specimens; the first of these very short and under procumbent spine, second longer and 
under fourth spine, third and fourth under soft dorsal; the dark spot on posterior part of lateral line 
usually not evident; anterior rays of dorsal and anal and outer rays of caudal black. 
Comparing young examples in our collection from Porto Rico with specimens of similar size from 
Woods Hole which have been identified as the young of T. gooclei , it is found that they are difficult to 
distinguish. Thegeneral form, proportional measurements, fins, and general coloration are very much 
alike, but the black vertical bars are apparently not present on the Woods Hole specimens. 
Fig. 37. — Trachinotus glaucus. 
This species attains a length of a foot or more and is a handsome fish, though not highly esteemed 
as food. In Porto Rico, however, it is handled by the fishermen and seems to rank with the species 
of Caranx in food value. It is found in tropical America from Virginia to the Caribbean Sea; generally 
common from the Carolinas to Florida and in Porto Rico. Our collection contains examples from 
Mayagucz, Aguadilla, Ponce, and Isabel Segunda. Mr. Gray’s collection has two from San Geronimo. 
Chseiodon glaucus Bloch, Ichthyologia, pi. 210, 1787, Martinque; on a drawing by Plumier. 
Trachynotus glaucus, Poey, Fauna Puerto- Riquena, 333, 1881; Stahl, 1. c., 77 and 104, 1883. 
Tracldnotus glaucus, Jordan & Evermann, 1. c., 940, 1890. 
97. Trachinotus falcatus (Linnaeus). Round Pompano; Palomela; Permit. 
Head 3.6; depth 1.6; eye 3.9; snout 3.6; maxillary 3; mandible 2.4; interorbital 2.25; D. vi-i, 
19; A. n-i, 17; pectoral 1.4; ventral 2.7; caudal 0.8; scales very numerous. 
Body ovate, compressed, back greatly elevated; profile of snout nearly vertical; mouth small, 
maxillary reaching nearly or quite to middle of eye; teeth deciduous, in villiform bands in younger 
individuals; anterior ray of dorsal and anal much produced, that of dorsal reaching beyond posterior 
end of fin, 2.5 in body; that of anal shorter, 3.3 in body; ventrals very small, reaching vent; caudal 
widely forked, the lobes long. 
