﻿MIRANDA RIBEIRO, ON FISHES FROM THE JPORANGA RIVER. 5 



Trichoiiiycterus pimctulatus (Cuv. & Val.) 



Mr. Krone sent me another fish found by him in the 

 Iporanga. This fish increases the number of species inhabiting 

 the river and I think it must solve a question of synonymy. 



Weyenbergh has described and figured in the »Actas de 

 la Academia Nacional de Ciencias Exactas de Cordoba-R.A., 

 vol. III, pg. 11, est. III, a Trichomycterus that he has named 

 cordovensis and Eigenmann & Eigenmann were compelled to 

 place it as a doubtful species, in their good work on »South- 

 American Nematognathi.» 



Perugia had two specimens of the Museum of Genoa 

 (Annali del Museo di GenovaX2a. Ser. 638, 1892) from Sta. 

 Fé through Weyenbergh, he found the animals very similar 

 to Trichomycterus diskar: »the small difference found could be 

 attributed to age, for the specimens sent by the author are 

 young». 



The figure given by Weyenbergh is also similar to that 

 of a young male of T. dispar, and Boulenger says: »Perugia 

 compare avec raison T. cordovensis å T. dispar Tsch. des Andes 

 du Perou.» (Bol. Mus. Tor. XII 1897). Eigenmann & Eigen- 

 mann spöke of T. dispar as presenting two varieties: T. 

 dispar Tschudi and T. punctulatus Cuv & Val. 



The existence of the last variety in the Iporanga, as 

 may be seen from the photograph, shows that the views of 

 Perugia were right. But they are a fact already pointed at 

 by GiJNTHER in the Annals and Magazin of Natural History, 

 (5) vol. 6, July, 1880, pg. 12, where this author wrote: »T. 

 dispar Tschudi (= T. cordovensis, Weyenbergh,)» 



We have preserved the name punctidatus, instead of dispar, 

 for the specimen we have is fully corresponding in characters 

 to that variety. 



Rio de Janeiro, April 1907. 



Tryckt den 11 juni 1908. 



Uppsala 19US. Almqvist & Wiksells Boktryckeri-A. -B. 



