156 Annals of the Carnegie Museum. 



247. A. Crenicichla saxatilis (Linnaeus). 



248. B. * Batrachops ocellata Perugia. 



249. P. Batrachops semifasciatus Heckel. 



250. * Batrachops ocellatus Perugia. 



251. A. Satanoperca pappaterra Heckel. 



252. B. * Geophagus balzanii Perugia. 



253. A . Geophagus jurupari Heckel . 



PLEURONECTIDiE 



254. P. Achirus jenynsii (Giinther). 



Total, two hundred and fifty-four species. Of these ninety-five are, 

 as far as known, peculiar to the basin of the Paraguay ; one hundred 

 and thirty-two, or over half, are common to the basins of the Amazon 

 and the Paraguay. Only twenty-one are also found in the coast 

 streams north of Rio de Janeiro, while eighteen are also fouud in the 

 Rio San Francisco. 



EXPLANATION OF PLATES. 

 Plate XXXI. 

 Figs. 1-2. Dysichthys australe Eigenmann & Ward. Type and cotype. 



♦ 



Plate XXXII. 



Fig. 1. Pimelodella mucosa Eigenmann & Ward. Type. 



Fig. 2. Pimelodella gracilis Valenciennes. 



Fig- 3-4. Iheringichthys mega lops Eigenmann & Ward. Type. 



Plate XXXIII. 

 Fig. I. Iheringichthys labrosus (Kroyer). 

 Fig. 2. Dentition of Serrasalmo humeralis Cuv. & Val. 



Plate XXXIV. 

 Fig. 1. Hemidoras paraguayensis Eigenmann & Ward. Type. 

 Figs. 2-3. Homodicctus anisitsi Eigenmann & Ward. Type. 



Plate XXXV. 

 Fig. 1. Hemiodontichthys acipenserinus Eigenmann & Eigenmann. 

 Fig. 2-3. Loricaria typus (Bleeker). 



Plate XXXVI. 

 Figs. 1-3. Sturisoma robnsta (Regan). 



Plate XXXVII. 



Figs. 1-2. Loricaria carinata Castelnau. 

 Figs. 3-4. Loricaria labialis Boulenger. 



