NATURAL SCIENCES OP PHILADELPHIA. 251 



body, nearly four inches in length (with caudal); depth, 3.5 times 

 in the same. Orbit, twice i^reorbital bone, equal muzzle, one- 

 fourth wider than interorbital space, one-third head. 



Total length .0G3 m.; to basis anal .0335; do. ventral .019; 

 do. dorsal (axial) .015 m. Color brown; a black band from 

 orbit to basis caudal. A black spot at base, and one at tip of 

 caudal. Basis of dorsal and anal brown, rest 3'ellow. A black 

 band from orbit to angle of interoperculura. Cheeks and opercu- 

 lum with blue spots separated by yellow lines. River Ambyiacu. 



GEOPHAGTJS BADIIPINNIS, Cope, sp. nov. 



Form short oval ; body deep; front steeply descending, concave 

 between the orbits ; the muzzle projecting. Depth one-half length 

 without caudal fin; head 2.4 times in the same. Orbit 3.5 times 

 in length of head; 1.3 times into interorbital space, which equals 

 length of muzzle with under jaw. Preorbital bone .^15 the dia- 

 meter of the orbit. End of maxillary bone falling opposite the 

 pupil. Fin rays D. xiii-12, A. iii-11. Scales 3-21-8-10; six 

 series on the cheek; operculum scaled. Twelfth dorsal ray equal 

 length of muzzle plus half of orbit ; the rays gradually diminish- 

 ing in length to the second. Caudal fin broadl}^ scaly at base ; 

 no scales at base of second dorsal. Pectoral fin long, extending 

 to opposite last soft dorsal ray ; ventrals to third soft anal. 



Color golden, blue bands on the jjrefrontal bone, and longitu- 

 dinal shades on the scales. Dorsal fin dusky spotted, anal with 

 numerous bay-yellow spots in vertical rows. Total length .15 m.; 

 to origin dorsal (vertical line) .043 ; do. to ventral .051; do. anal 

 .084. 



This species, having the coloration of G. ju7'upari, has the orbit 

 nearly as median as in G. tseniatus. I do not see the necessity 

 of subdividing Heckel's genus Geophagus into three {Geophagus^ 

 Sataiioperca, and 3Iesops),SiS has been proposed by GUnther (Catal. 

 Brit. Mas.). 



GEOPHAGUS JURUPARI, Heckel. 

 Satanoperca jurupari, Giinth. Cat. B. M. v. 313. 



D. XV. 10, A. iii. 7. Scales 3-31-9; suborbitals 6 (7) rows. Pre- 

 orbital bone 1.G6 times orbit. 



1872.] 



