Jordan and Evcrniafui. — Fishes of North America. 1419 



Johnius crouvina, Castelnau, Anim. Nouv. ou Kares de TAni^r. dii Sud, Poissons, 11, 



pi. V, flg. 1, about 1855, Rio Crixas, Rio Araguay. 

 Johni-us amazonicus, Castelnau, Anim. Noiiv. ou Rares de 1' Amer. du Sud, Poiss., 12, pi. 4, 



flg. 1, 1855, Amazon. 

 Corvina nionacantha, Cope,* Trans. Am. Phil. Soc. 1866, 402, near Paramaribo, Dutch 



Guiana. 

 Scicena amazonica, Gunther, Cat., ii, 284, 1860. 

 Scicena crouvina, Gunther, Cat., ii, 287, 1860. 

 Pachyurui squamosissimug, Gunther, Cat., ii, 526, 1860. 

 DiploUpis squamosissimiis, Steindachner, Sci.iun. Bra.sil., 2, 1863. 

 Plagioscion gquamosissimtts, Jordan iz. Eigenmann, I. c, 383. 



1798. PLAGIOSCIOX HETEROLEPISi (Bleeker). 



Head 3i to 3*; depth 31 to 3». D. X-I, 28 or 29; A. II, 7; scales 4.5. 

 Caudal rhombic, ita length f that of head; body rather elongated, the 

 form much as iu Ophioscion tyjnciis but the head less depressed; profile 

 depi'essed above eye ; eye 4 in head, as loug as the snout, which is rather 

 long, bluntish at tip; preorbital t 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 (ia the figure); scales of tlie 

 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 2| in head; second anal spine small, 

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

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

 seen by us, perhaps not belonging to this genus, (erepog, difterent; 

 Xetclc,, scale.) 



Johnius heterolepis, Bleeker, Archives Neerlandai.ses, vni, 1873, 458, with plate, Surinam. 

 Scicena heterolepis, Jordan & Eigenmann, I. c, 405. 



1799. PLACaOSClON SUIUNAMEXSIS (Bleeker). 



Head 3t; depth 33. 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 depres,sed 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 5i in head ; preopercle rounded, nearly or 

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



^ The following is the substance of Professoj' Cope's description of Corvina monacantha: 

 First ventral ray i)rodnfed as a filament which readies past the vent; pseudobranchia' 

 none; eyes 5 in head; dcptli iMjual to lenntli of licad ; preopercle sharp, serrate ou its 

 vertical margin; pharyiii;i':il i)atrhes of tcetli small, tlie teeth bristly; caudal fln sub- 

 lanceolate; pectorals as long as xentials witliout filaments; anal spines short, single in 

 typical specimens; color, silvery, grayish above; no spots. D. X-I, 33: A. 1,5. 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. 



