40 UNIVERSITY OF WISCONSIN STUDIES 



ARACHNIDA 



Porocephalus gracilis Diesing 



This peculiar parasite (Fig. 14) was reported by Diesing 

 (Shipley, 1898) from Brazil where it occurs in a number of 

 species of fishes and reptiles. In Lake Valencia it was found 

 only in the chusco, Aquidens pulcher (Gill), occurring in cysts 

 in the peritoneum and liver. It was found in chuscos collected 

 in Lake Valencia at Isla del Euro, July 9, and in others collected 

 near Maracay, July 22, 26. By the Isla del Buro, July 9, six 

 chuscos contained cysts as follows : liver : 6, 8, 8, 1 , 5 ; peritoneum : 

 .7, 1. Near Maracay July 22 and 26 the results from four 

 specimens were liver: 2; peritoneum: 12, 4, 1. 



Beauchamp (1918) has recorded another porocephalid 

 parasitic in fishes from the Belgian Congo. 





