oG 



3Ii, C. T. Rciran on the South- American 



Snout 2-3 in the length of head, diameter of eye 3-4^, inter- 

 orbital width 3.[-:V^, depth of praiorbital 21-3?;. Maxillary 

 not extending to below the eye ; jaws equal anteriorly ; fold 

 of the lower lip not eoutiiiuons or siibcontinuous ; cheek 

 Avith 1-9 series of scales ; 11-14 gill-rakers on the lower part 

 of anterior arch. Scales 33-36 ~, 2 or 3 between lateral 

 line aiul anterior rays of soft dorsal, those of the thoraoic 

 region very small. * Dorsal XVII *-XIX 11-12 (13), com- 

 nieucing above the opercular cleft, the spines subequal from 

 the fifth or sixth, the last },-i the length of head ; dorsal 

 fin naked in the young, in the adult with the basal parts of 

 the interradial membranes covered with small scales. Anal 

 III 7-9. Pectoral U-1:^ the length of head, extending to 

 beyond origin and sometimes nearly to posterior end of anal. 

 Caudal truncate, with the uppermost ray often slightly pro- 

 duced. Caudal peduncle 1^-1^ as long as deep. Olivaceous, 

 sometimes with obscure cross-bars, and with a blackish spot 

 on the middle of the side ; vertical fins with series of dark 

 spots. 



R. Amazon; Guiana. 



7. Geophagus jurupari, 



Geophmjus leucostwtun, Miill. & Troscb. in Scbomb. Reis. in Brit. 



Guiana, iii. p. 02-5 (1848). 

 Satanopercajunipari, Giinth. Cat. Fisb. iv. p. 313 (1862). 

 Satanoperca leucodicta, Giinth. t. c. p. 314. 

 Satanoperca macrolepis, Giiuth. /. c. 

 Geophagus {Satanoperca) jurupari, Steind. Sitzb. Ak. Wien, Ixxi. 1875, 



p. 120. 



Depth of body 2?-2f in the length, length of head 2|-3. 

 Snout 2-22 in the length of head, diameter of eye 3-4^, 

 idterorbital width 3-3y, depth of prajorbital 2^-3. Maxillary 

 not extending to below the eye; jaws equal anteriorly; fold 



* 19 spines in one specimen only. 



