Memoirs Carnegie Museum, Vol.. VII. 



Plate xxxv i. 



K5S3S* 



KNOWN DISTRIBUTION OF THE PYGIDIIN/C. 



A Known distribution of Pygidium. Probably in all 

 mountain streams north of the latitude of Buenos 

 Aires and sporadically in lowlands. The localities in 

 Southern Chile not indicated. 



^h Known distribution of Hatcheria. 



1 Known distribution of Sckrbnema. 



I Known distribution of Eremophtlus. 



