Cichlid Genera RetrocuIii>5, Geojiliai^us, (Cc. ')! 



a comprcssoil lobo, with the fjill-rakcrs at its free mar;;iii. 

 A single dorsal fin, with X II-XIX 9-1 !• rays. Anal with 

 III ()-*.) rays. Pectoral asyiirnetrical, with 13-17 rays; 

 vciitrals below or a little behind the base of the peetoral. 

 Caudal rounded, truneatc or eniarf^inate, usually scaly at the 

 base and near the upper and lower margins. 



Twelve species from S. America, includin;^ Panama. 



Skeleton. 



In Geophnrfus jurupari the supraoccipital crest is elevated 

 and exti'Uils forward to the anterior margin of the frontals, 

 which art' hollowed out to form the posterior border of the 

 depression in which the pr;emaxillary |)rocesse3 lie. The 

 j)arietal crests are nearly hori/.ontal and merge into tiie 

 orbital margin. The pnemaKillary processes are long, but 

 the snout being much produced they do not reach the frontals. 

 There are 28 vertcljne ( 15 + 13) ; parapophyses are developed 

 on the priecaudal vertebr.e from the third; the ril)s are inserted 

 near the ends of the i)arapophyses. The third vertebra bears 

 a long inferior apophysis. The lower pharyngeals are united 

 by a straight suture. 



Steindachner j)ointed out that Geophayus hadiipinnis, Cope, 

 is a synonym of Cfuctobranchus flavescens. This was not 

 accepted by Cope, who stated that the fish was a true Geophagua, 

 and Pellegrin includes it in this genus. After carefully 

 comparing Cope's description and figure of Geophagus badii- 

 pinnis with specimens of CluetobrancJius jUivescens, I feel 

 absolutely certain of their specific identity. There had 

 evidently been some confusion of specimens in Prof. Copers 

 collections. 



Synopsis of the Species. 



I. G-17 <rill-rakers on the lower part of tlie anterior arcli. 

 A. Pectoral exteudin-; distinctly beyond the origin (jf anal. 

 1. Dorsal with 12 to 10 spines. 



a. Pectoral extending nearlv to the end of the base of anal. 



D. XII-XIV 12-14 . .■. 1. JSahani. 



b. Pectoral not or scarcely extending beyond the middle of anal. 



D. XIII-XV 1)11. Scales .'W J*;J. IVct.ral ex- 

 tendin;; nearly to above middle of anal ; caudal 

 ) eduiicle at least as long as deep 2. f/t/>nno(/eni/.i, 



D. XIV-XVI8-10. Scales 27-28 ^^^ Pectoral ex- 

 tending to above middle of anal ; caudal peduncle 

 deeper than long^ 3. hrachi/urus. 



