26 ME. G. A. BOULENGER ON FISHES 



CICHL1D.E. 



3. ACARA BIMACULATA, L. 



Descalvados, Matto Grosso ; Paraguayan Chaco. 



4. ACAEA TETRAMERUS, Heck. 



Descalvados, Matto Grosso ; Paraguayan Chaco. 



5. Mesonauta insignis, Heck. 

 Descalvados, Matto Grosso. 



fi. Crenicichla johanna, Heck. 

 Paraguay. 



7. Crenicichla saxatilis, L. 

 Paraguay. 



8. Geophagus duodecimspinosus. (Plate IV. fig. 1.) 

 Geophagus duodeciinspinosus, Boulenger, P. Z. S. 1895, p. 524. 



Depth of body If in total length, length of head 3 times. Eye nearer gill-opening 

 than end of snout, its diameter 3^ times in length of head and a little less than 

 interorbital width; prseorbital 1^ diameter of eye; scales on cheek small, in 7 series. 

 Dorsal XII 14 ; spines increasing in length to the fourth, which is f length of head ; 

 soft portion scaly at the base, longest rays nearly as long as head. Pectoral one fourth 

 longer than head. Ventrals shorter, reaching anal. Anal III 9 ; third spine longest, 



4 18 



as long as third dorsal. Caudal truncate. Scales 30 ^ ; lat. 1. -g. Yellowish, with a 

 dark vertical streak below the eye, and a dark round spot on the side below the 

 lateral line; vertical fins brownish, with some small, round, white spots on the soft 

 dorsal and anal ; pectorals white, ventrals blackish. 



Total length 90 millim. 



A single specimen from Paraguay. 



PLEUROSECTID^E. 



9. SOLEA JENYNSII, Gthr. 



Paraguay. 



10. Sorubim lima, Schn. 

 Paraguay. 



SILURID.E. 



