52 UNIVERSITY OF COLORADO STUDIES 



by a single median dorsal pore on the third post-cephalic segment; dorsal and ventral 

 jaws dissimilar; head elongate, its greatest diameter less than the greatest diameter of 

 the body; lips two; body terete in all regions. 



This worm is a small, colorless, leech-like animal, not exceeding 5.5 mm. in length. 

 It is composed of n segments (of which the first 8 are easily seen) and a head. The 

 terminal segment bears a sucking disk by means of which the worm attaches itself to the 

 host. It may be found on almost any part of the ventral surface of the host. 



A full description, with figures, is about to be published. 



