12 ON SPECIES OF CYNOPOTAMUS. 



tween the anterior rays of dorsal and anal there are com- 

 monly 12 scales above the line and 12 below ; an occasional 

 specimen reaches 13. 



CYNOPOTAMUS MOLOSSUS Kner. 



On such as were examined the formula stood as follows : 

 D. 11, A. 43-47, L.I. 46, L.tr. -^- Humeral and 

 caudal spots distinct on the numerous small specimens 

 from Serpa and Jutahy. 



CYNOPOTAMUS MICROLEPIS. 

 Epicyrlus microlepis Rht. 



On specimens from Obydos there are fifty- seven rays 

 in the anal, ninety-seven scales in the lateral line, and in 

 the transverse series there are twenty-four above the line 

 and twenty-three below it. 



CYNOPOTAMUS AFFINIS. 

 Anacyrtus affinis Gth. 



Anal rays varying from 53 to 57, scales in the lateral 

 line from 73 to 80, and in the transverse series between 

 dorsal and anal -there are 20 to 22 scales above the line 

 and 17 to 19 below it. Humeral and caudal spots small 

 to absent. Collected at Iga, Coary, Javary, Jose Fer- 

 nandez, Jutahy, Lago Alexo, Lake Hyanuary, Lake Sar- 

 aca, Manacapurua, Sao Paolo and Serpa. 



CYNOPOTAMUS MYERSII. 

 Rceboides myersii Gill. 

 D. 11, A. 51-56, L.I. 88-95, L.tr. |gf- 

 From the number of specimens collected and the locali- 

 ties this would appear to be one of the most widely dis- 

 tributed and plentiful of these fishes. Hab. Coary, Fon- 

 teboa, Javary, Jutahy, Jose Fernandez, Lago Alexo, 



