Jordan and Evermann. Fishes of North America. 1419 



Johnius crouvina, CASTELNAU, Anim. Nouv. ou Bares de 1' Amer. du Sud, Poissons, 11, 



pi. v, fig. 1, about 1855, Rio Crixas, Rio Araguay. 

 Johnius amazonicus, CASTELNAU, Anini. Nouv. ou Hares de 1' Amer. du Sud, Poiss 12 pi 4 



fig. 1, 1855, Amazon. 

 Corvina monacantha, COPE,* Trans. Am. Phil. Soc. 1866, 402, near Paramaribo, Dutch 



Guiana. 



Scicena amazonica, GUNTHER, Cat., n, 284, 1860. 

 Scicena crouvina, GUNTHER, Cat., n, 287, 1860. 

 Pachyurus squamosissimus, GUNTHER, Cat., n, 526, 1860. 

 Diplolepis squamosiasimus, STEINDACHNER, Scia-n. IJrasil.,2, 1863. 

 Plagioscion gquamosisfsiwus, JORDAN k, EIGENMANN, I. c., 383. 



1798. PLA(JIOSCIO\ I1KTKKOLK1MS1 (Bleeker). 



Head 3* to 34; depth 3.1 to 3;-;. ]). X-I, 28 or 29; A. II, 7; scales 45. 

 Caudal rhombic, its length 3 that of head; body rather elongated, the 

 form much as in Opkiosdon typhus but the head less depressed; profile 

 depressed above eye; eye 4 in head, as long as the snout, which is rather 

 long, bluntish at tip; preorbital f length of eye; mouth moderate, hori- 

 zontal; maxillary extending to below middle of eye, 2^ in head; teeth in 

 many series, outer series of the upper jaw somewhat longer, those of the 

 lower jaw all subequal; preopercle entire (in the figure); scales of the 

 cheek cycloid, those of the opercle and body ctenoid; 46 series of scales 

 above the lateral line, 40 below it; spinous dorsal little longer than high, 

 the spines slender, scarcely flexible, the third longest, 2 in head; soft dor- 

 sal densely scaly, the longest ray 2f in head; second anal spine small, 

 little longer than the eye, 3i in head; pectorals 1| in head. Color green- 

 ish or bluish-gray above, silvery below; fins yellowish. Surinam; not 

 seen by us, perhaps not belonging to this genus, (erspos, different; 

 A.e7ti$, scale.) 



Johnius heterolepis, BLEEKER, Archives Neerlandaises, vm, 1873, 458, with plate, Surinam. 

 Scioena heterolepis, JORDAN & EIGENMANN, I. c., 405. 



1799. PLAGIOS10> SUUINAMENSLS (Bleeker). 



Head 3| ; depth 3j=. D. X-I, 31 to 33; A. II, 6; enlarged scales in lateral 

 line about 50, about 100 in a longitudinal series above it. Second anal 

 spine large and strong, its length 2 to 3 in head; teeth of lower jaw with 

 the inner series considerably enlarged; snout very short, blunt, 5| in head; 

 head depressed above the eyes; mouth large, rather oblique, subinferior, 

 the maxillary 2 in head, reaching past eye; back elevated; ventral out- 

 line nearly straight; caudal peduncle slender; preorbital broad, a little 

 narrower than eye, which is 5^ in head; preopercle rounded, nearly or 

 ignite entire; teeth of outer scries in upper jaw and inner series of lower 



'* The following is the substance of Professor Cope's description of Corvina monacantha: 

 First ventral ray produced as a filament which reaches past the vent ; pseudobranchia? 

 none; eyes 5 in head; depth equal to length of head; preopercle sharp, serrate on its 

 vertical margin; pharyngeal patches of teeth small, the teeth bristly; caudal fin sub- 

 lanceolate; pectorals as long as ventrals without filaments; anal spines short^single in 

 typical specimens; color, silvery, grayish above; no spots. D. X-I, 33; A. I, 5. Scales 

 10-49-16. 



t Bleeker's figure represents the species as having the preopercle entire as in Johnius 

 and Plagioscion. In other regards it resembles Ophioscion. 



