ANNELID GENUS CAMBARINCOLA — HOFFMAN 



361 



Figures 69-73. — Structural details of two species of Cambarincola. 69, C. heterognatha, 

 new species, paratype in lateral aspect; 70, the same, lateral aspect of jaws; 71, the same, 

 reproductive systems, 72, C. demissa, new species, body profile of paratype. Wise 

 Co., Virginia. Part of body wall shown cut away to indicate the size of the reduced 

 reproductive organs in situ; 73, the same, reproductive systems in lateral aspect, same 

 specimen. 



The collection localities, all of which I have seen, are rather small, 

 smft, mountain brooks, somewhat different m character from the 

 lai"ger and perhaps more placid streams in which fallax occm-s most 

 abundantly. Conceivably the peristomium of holostoma represents 

 the development of (or retention of) a more efficient holdfast device 

 than the dissected and lobed mouth oi fallax, a matter which would 

 certainly enhance the origin and maintainence of specific differences 

 by ecological factors. 



The problem is recommended to someone having the opportimity to 

 study branchiobdellids and their distribution in the upper James Eiver 

 system of western Vhginia. 



HETEROGNATHA GROUP 



A separate group must be erected to represent on a coordinate 

 standing the very unusual and highly specialized new species described 



