BULLETIN 



OF THK 



VOL. 22. SALEM : JAN., FEB., MAR., 1890. Nos. 1-2-3. 



ON THE SPECIES OF THE GENUS CHALCINUS 



IN THE MUSEUM OF COMPARATIVE 



ZOOLOGY AT CAMBRIDGE, 



MASS., U. S. A. 



BY 8. G ARM AN. 



THE Thayer Expedition of Professor L. Agassiz and his 

 party, to Brazil, collected a large number of duplicate speci- 

 mens of species of Characinidae. In preparing these for dis- 

 tribution to the correspondents of the Museum they have 

 been identified from the original descriptions with results 

 that do not agree with others of recent publication. As a 

 consequence of disagreement with the constitutions of the 

 genera as heretofore accepted, it is thought advisable to 

 publish the conclusions in this place. 



There are several general features of Chalcinus that de- 

 serve a few words of notice before dealing with the sepa- 

 rate species. The labial folds and the barbels are present 

 on each of the various forms, with the possible, but un- 

 likely, exception of O. paranensis. The latter is known 

 to me only by the description, yet it agrees so closely with 



ESSEX INST. BULLETIN, VOL. XXII 1 (1) 



