1883.] NATURAL SCIENCES OF PHILADELPHIA. 121 



Oerres aprion Cuv. & Val., vi, 461, 1830 (Martinique; San Domingo; 

 Montevideo; East Coast of Mexico). (Not of Gi\ini\\ev = Eucinos- 

 tomus pseudogula Poey); Poey, Rep. Fis. Cuba, i, 316, 1865. 



Diaptereus aprion Poey, Syn. Pise. Cuba, 321, 1868. (Cuba.) 



Oerres zebra Miiller & Troschel, Schomburgk Hist. Barbadoes, 668, 

 1848 (Barbadoes); Giinther, i, 343, 1859, and iv, 254, 1862 (Copied); 

 Steindachner, Iclithyol. Notizen, iv, 11, 1867 (Surinam); Stein- 

 dachner, Zur Fisch-Fauna des Magdelenen-Stromes, 9, 1878 (Rio 

 Magdalena, identified with C. squamipinnis); Jordan & Gilbert, 

 Bull. U. S. Fish Comm., 1881, 329 (Mazatlan). 



Oerres squamipinnis Giinther, i, 349, 18.59, and iv, 254. 1862 (Jamaica; 

 Gautemala); Giinther, Fish. Centr. Amer., 391, 1869 (No description) 

 (.Jamaica; Cliiapam; Panama); Steindachner, Ichthyol. Notizen, 

 iv, 12, 1867 (Surinam). 



Oerres cinereus Jordan & Gilbert, Bull. U. S. Comm., 1882, 108 

 (Mazatlan); and Syn. Fish. N. A., 935, 1883. 



Habitat. — Both coasts of Tropical America (Mazatlan ; CJiiapam ; 

 Panama ; Bahamas ; Barbadoes). 



7. Gerres gula Cuvier & Vnlencienne?. 



Oerres gula Cuv. & Val., vi, 464, 1830 (Martinique; Brazil); Jenyns, 



Zool. Beagle, Fishes, 58, 1842; Giinther, i, 346, 1859, and iv, 255, 



1862 (Atlantic Coasts of Tropical America); Poey, Rep. Fis. Cuba, 



i, 316, 1865. 

 Eucinostomus argenteus Baird & Girard, Ninth Smith. Report, 345, 



1855; Baird & Girard, Mex. Bd. Survey, 17, pi. 9, figs. 9-12, 1859. 

 fOerres argenteus Giinther, iv, 256, 1862. (Atlantic Coasts of N.A.) 

 Eucinostomus gulula Poey, Anal. Soc. Esp., iv, 128, pi. vi, 1875. 

 Diapterus homonymus Goode & Bean, Proc. U. S. Nat. Mus., 1879, 



340. (Clear Water Harbor, Fla.) 

 Oerres gula Jordan & Gilbert, Syn. Fish. N. A., 934, 1883. (West 



Indies, north to Cape Cod.) 



Body elliptical, compressed, dorsal profile tapering regularly 

 each way from beginning of spinous dorsal ; anterior profile nearly 

 straight, posterior slightl}' more convex. Line from angle at 

 front of breast to vent nearly- straight. Mouth small, slightly 

 oblique (when not protruded), maxillary reaching just be3'ond 

 A^er-tical at front of eye, exposed part triangular, about twice as 

 long as broad. Premaxillaries very protractile ; premaxillary 

 groove longer than broad, scaled in front, with a naked pit behind; 

 these scales, however, are not very distinct in j^oung specimens, 

 and are apt to be rubbed off in poorly preserved ones. 



Villiform teeth on both jaws ; no canines, incisors, or molars ; 

 no teeth on vomer or palatines. Pi'eopercle entire ; gill-rakers 



9 



