478 



FEANK E. BEDDARD. 



The diffuse nephridial system has not yet been met with in 

 any of the Geoscolecidaej in this particular, therefore, as in 

 the presence of prostates and penial setae, Deodrilus re- 

 sembles certain genera (e.g. Cryptodrilus) of the Eudri- 

 lidae. Finally, the absence of diverticula to the spermathecae 

 brings Deodrilus into relations with the Geoscolecidae. 

 It seems to me that the relationship of Deodrilus to some 

 other forms is best expressed by the following diagram : 



Deodrilus 



"Geoscoiecidse" 



Pontodrilus and many 

 "Eudrilidse" ^ 



Cryptodrilus 



Periciisetidae 



Genus — D e o d r i 1 u s. 



Setse arranged in pairs upon the ventral surface, peculiar in 

 shape, and ornamented. Absent upon the first four seg- 

 ments. 



Prostomium absent. 



Clitellum occupying Segments 15 — 18 (or thereabouts), 

 complete anteriorly, saddle-shaped posteriorly. 



Gizzard in Segment 6. 



' I do not for tiie present particularise the exact limits wliich I apply to 

 these families. 



