SPAROID FISHES OF AMERICA AND EUROPE. 519 
Diplodus rhomboides Jordan & Gilbert, Syn. Fish. N. A., 558, 1883; Jordan, Proc. 
U.S. N. M. 1884, 129 (Key West); Jordan & Swain, Proc. U.S. N. M. 1884, 
233 (Cedar Keys); Jordan, Cat. Fish. N. A., 91, No. 1064, 1885 (name only); 
Jordan, Proc. U.S. N. M. 1886, 28 (Beaufort, N.C.). 
Perca rhomboidalis Goode & Bean, Proc. U.S. N. M. 1885, 20 (not of Linnzeus). 
Habitat: Atlantic and Gulf coasts of the United States, Cape Cod 
to Cuba. 
Etymology: /éu80s, rhomb; cides, appearance. 
This species is very common all along the eastern coast of the United 
States south of New York, and on the Gulf coast as far west as Pen- 
sacola. 
XXVII. ARCHOSARGUS. 
Archosargus Gill, Canadian Naturalist, August, 1865 (probatocephalus). 
Type: Sparus probatocephalus Walbaum. 
Etymology: dpzés, chief; capyés, Sargus, an old name of Diplodus. 
This genus, like Lagodon and Stenotomus, which show the same 
character of the procumbent dorsal spine, is confined to American 
waters. There are two color types in the genus, one group being made 
up of species with broad black crossbands, the other of species with 
golden streaks and inconspicuous crossbands, resembling the species 
of Lagodon. 
ANALYSIS OF SPECIES OF ARCHOSARGUS. 
a. Occipital crest rather thin, its honeycomb structure not exposed. Species with 
streaks of steel-blue and golden, the dark crossbands narrow, disappearing 
with age, about one-third the interspaces; a black humeral spot. 
b. Dorsal spines 13; incisors } on each side; side of back with 8 or 9 golden 
streaks, which are narrower than the metallic-blue interspaces. 
c. Seales 9-48-15; pectoral fin not quite reaching second anal spine; body rather 
deep and compressed, the depth 2 to 24 in length; head 3}; profile rounded, 
steep; mouth moderate, the maxillary not reaching front of orbit, 3 to 34 in 
head; eye large, as broad as preorbital, 3} to 4 in head, 14 in interorbital 
width. Incisors $ on each side, entire, or with a shallow notch; molars 
3-rowed above, 2-rowed below. Fifth dorsal spine highest, 2 to 24 in head; 
second anal spine strong, recurved, 2} in head; ventrals moderate, 44 to 44 
in head, not nearly reaching vent. Olivaceous, silvery below, the upper 
parts with golden longitudinal stripes alternating with bluish interspaces; 
humeral spot larger than eye. D. x1, 10; A. 111, 10 or 11; scales, 8 or 
Gof ODO LAO Gre sepia aa 5 ha Saleh ckisee Se alec UNIMACULATUS, 119. 
ce. Seales 7 or 8-48-15; pectoral fin reaching second anal spine; body rather less 
deep, the snout a little longer; ventrals shorter, 5 ic 53 in head; otherwise 
essentially as in the preceding, of which it is the Pacific coast representative. 
POURTALESII, 120. 
bb. [Dorsal spines 12; incisors $ on each side. Depth 2,°; in total length; head 
more than 4; eye 3} in head, 1 in snout; maxillary extending to a point 
between the pupil and the “interior” border of eye; protile with a slight 
depression above the eye; second anal spine much longer than the third. 
Color grayish, belly white; 8 golden longitudinal bands; a black shoulder- 
Speier eM OE CE OCW) 8 catnaciccelsiccs cv<$ sascsend TRIDENS, 121. 
