ADDENDA 92. GERRID^E GERRKS. 935 



To the synonymy of this species add : 



(GcrrcsyiilaC. & V. vi, 464; Giiuther, i, 346, ami iv, 255: Diopter us gulaPoey, Synopsis 

 Pise. Cubens. 323, is a dilferent species. The types of Eucinostomus aryenteiw }'. t (i. 

 from New Jersey, are too young to be certainly identified. Numerous specimens col- 

 lected by us iu North and South Carolina belong to Gcrres yuhi.) 



Page 584. After Gerres homonymus read : 

 981 (6). G. ciBieu'ews (Walb.) J. &G. 



Silvery; back and sides with G to 8 bluish vertical bars, about as 

 broad as the pupil, these extending to opposite lower part of orbit ; 

 the bars formed of confluent blotches and rarely obsolete; axil dark; 

 tins with some dark points. Body rather elongate, the back somewhat 



\ 



elevated and compressed, the belly nearly straight, with an angle at 

 the breast. Teeth very small; preorbital and preopercle entire; fur- 

 row on top of head for premaxillary processes broad, scaleless, rounded 

 behind. Dorsal spines slender, flexible, the longest f head, half longer 

 than second anal spine. Pectoral slender, rather longer than head. 

 Caudal deeply forked, a little longer than head. Head 3; depth 2. 

 D. IX, 10; A. Ill, 7; scales 5-40-10. L. 18 inches. The largest of 

 our species of the genus. West Indies and both coasts of Mexico; 

 north to Florida Keys and Gulf of California. 



(Mugil cinereus Walbaum, Artedi Piscium 1792, 22^ (after Turdu-s cincrciis 

 Catesby): Gerres aprion C. & V. vi, 461, 1830 (not of Giiulher): Diapterus aprlon Poey, 

 Syn. Pise. Cub. 1868, 321: Gerres zebra Mu'ller & Troschel, Schomburgk Hist. Barba- 

 does, 1848, 668: Gerres zebra Giinther, i, 343 and iv, 254: Gerres squamipinnis Gun the r, 

 i, 349 and iv, 254.) 



The species of Gerres here noticed may be readily separated by the 

 following analysis : 



a. Preopercie serrate; anal rays III, 8; second anal, and third dorsal spines long: 



body elevated. (Gcrres.) 



b. Preorbital serrate; furrow for premaxillary processes broad, naked; body 

 striped ....................................................... PI.UMIERI. 



ll>. Preorbital entire (Mojarra Poey); furrow for premaxillary processes broad, 

 scaled; body not striped ................................. OLISTHOSTOMA. 



aa. Preopercle entire; anal rays IJI, 7; dorsal and anal spines comparatively low; 



body little elevated. (Diapterus Rauzani.) 

 c. Premaxillary groove scaled in front, with a naked pit behind. 



d. Depth about half length; third dorsal spine little longer than second anal. 



HOMONYMDS. 



dd. Depth about | lengt'j; third dorsal spine about twice length of second 

 anal ......... .................................................. GULA. 



cc. Premaxillary groove entirely naked. 



e. Premaxillary groove broad ; back elevated, the depth about J length ; 

 body with faint bars .................................. .. CIXEREUS. 



ee. Premaxillary groove linear; back scarcely elevated, the depth about one- 

 third length; body not barred ............................. HAKKNGUU-S. 



