SPAROID FISHES OF AMERICA AND EUROPE. 519 



D'qjlodus rhomboides Jordiin & Gilbert, Syu. 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). 



Perea rhomboidalis Goode & Bean, Proc. U. S. N. M. 1885, 20 (not of Linnaeus). 



Habitat: Atlantic and Quit' coasts of tlie United States, Cape Cod 

 to Cuba. 



Etymology: /Jo^/S**?, rliomb; e7(5o<7, appearance. 



This species is very common all along" the eastern coast of the United 

 States south of Kew York, and on the Gulf coast as far west as Pen- 

 sacola. 



XXVII. ARCHOSARGUS. 



Archosargus Gill, Canadian Natnralist, August, 1865 ( prohatocephalus). 



Type : SjJarus prohatocephalus Walbaum. 



Etymology: ^pyj>^^ chief; aapY'*^, Sargus, an old name of Diplodus. 



This genus, like Lagodon and Stenotomiis, 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 witli broad black crossbands, the other of species with 

 golden streaks and inconspicuous crossbands, resembling the species 

 of Lagodon. 



ANALYSIS OF SPFX'IKS OF ARCHOSARGUS. 



a. Occipital crest rather thin, its honeycomb stracture not exposed. Siiecies with 

 streaks of steel-blue and golden, the dark crossbands narrow, disappearing 

 with age, about one-third the interspaces; a black humeral spot. 

 h. Dorsal spines 13 ; incisors f on each side; side of back with 8 or 9 golden 

 streaks, which are narrower than the metallic-blue interspaces, 

 c. Scales 9-48-15 ; pectoral fin not quite reaching second anal spine; body rather 

 deep and compressed, the deptli 2 to 2^ in length ; head 31 ; profile rounded, 

 steep; mouth moderate, the maxillary not reaching front of orbit, 3 to 3J in 

 head; eyo large, as broad as preorbital, 3| to 4 in head, 1^ in interorbital 

 Avidth. Incisors f on each side, entire, or with a shallow notch; molars 

 3-rowed above, 2-rowcd below. Fifth dorsal spine highest, 2 to 2i in head; 

 second anal spine strong, recurved, 2^ in head ; ventrals moderate, 4| to 4* 

 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. xiii, 10; A. iir, 10 or 11; scales, 8 or 



9-45 to 50-14 to 16 UniiMaculatus, 119. 



ce. Scales 7 or 8-48-15; pectoral fin reaching second anal spine; body rather less 

 deej), the snout a little longer; ventrals shorter, 5 to 5| in head; otherwise 

 essentially as in the i)receding, of which it is the Pacific coast representative. 



POUKTALESII, 120. 

 hi. [Dorsal spines 12; incisors J on each side. Depth 2V'u in total length; head 

 more than 4; eyo 3^ in head, 1 in snout; maxillary extending to a point 

 between the pupil and the "interior" border of eye; profile 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- 

 spot. D. XII, 10; A. Ill, 9.J (I'ocii) Triuens, 121. 



