SPAROID FISHES OF AMERICA AND EUROPE. 495 



73. POMADASIS CORVINiEFORMIS. 



Ha'mulon corvintrformc Stciudaclinor, Ich. Notizen, vii, 1(3, 18G8 (8iiutos, Brazil). 



Habitat: Coast of Brazil. 



Etymology: Corvina, a genus of iSvia'niclw; forma, shape. 



This sjiecies has been taken a few times on the coast of Brazil. The 

 specimen examined by us (1539, M. C. Z.) was collected by Agassiz at 

 Rio Grande do Sul. 



74. POMADASIS LEUCISCUS. 



Prisfij)oma Icuciscits Ciiintlior, Proc. Zool. Soc. Londou 1861, 147 (San Jose de Nica- 

 ragua, Chiapas). 



Habitat: Pacific coast of tropical America. 

 Etymology: Leuciscus, a chub or shiner, from Xeuxd<;, white. 

 This species is not rare on the Pacific coast of Mexico. Tlie speci- 

 mens examined by us are from Mazatlan and Panama. 



75. POMADASIS ELONGATUS. 



Priatipoma leuciscus, var. elongatus Steindachner, Neue und soltene Fische aiis dem k. k. 

 Museum, 1879, 30, 52, Taf. 9, f. 2 (Tumbez, west coast of South America). 



Habitat : Pacific coast of tropical America. 



Etymology: Elongatus, elongate. 



This species occurs with P. leuciscus, and so far as our experience 

 goes it is the more common of the two. The differences between them 

 are very slight. Elongatus is more slender, with straight profile, the 

 j)reorbital broader, and the anal spines somewhat smaller, the third 

 hardly as long as the second. In all other respects the two are identical 

 and, at the best, P. elongatus must be regarded as a doubtful species. 

 Possibly it is the male of P. leuciscus, but such sexual differences, or in 

 fact any sexual differences, are unusual in the family. 



XVI. ORTHOPRISTIS. 



Orthopristis Girard, U. S. Mex. Bound. Survey, 1859, 15 {duplex— chrysopterua) 

 Microlepidotus Gill, Proc. Ac. Nat. Sci. Phila. 1862, 255 (inornatus). 

 Pristocantharus Gill, Proc. Ac. Nat. Sci. Pliila. 1862, 256 {cauthari7ius). 

 Isaciella Jordan & Fesler, subg. nov. (hrerijnnnis). 



Type: Orthopristis duplex Girard=Pprcrt chrysoptera Linnseus. 



Etymology: 6^06^^ straight; -pianq, used for -pioz-qq, a saw, in refer- 

 ence to the evenly serrated preopercle. 



This genus contains a considerable number of species differing from 

 Pomadasis by the long anal fin, the smaller scales, and by the less devel- 

 opment of the dorsal spines. Nearly all the species are American. The 

 group is divided into three subgenera, the extremes of which differ 

 considerably from each otlier. 



For the sake of comparison, we introduce the single representative 

 of this genus found in the waters of Europe. 



