NEW SPECIES OF OCNERODRILUS. 257 



xviii,and does not encroach on the adjoining somites. Such 

 distinct clitellum is not possessed by the other species, in 

 all of which the clitellum encroaches on the adjoining 

 somites. The inner pair of setcv in somite xvii is wanting 

 entirely. In this respect this species differs from many 

 other species, except O. agricola, Hoidriei -And contractus, 

 which all possess this characteristic. 



Spcriuathecal pore between somites vii and viii, and 

 the s-permathecie in somite viii, are smaller than the 

 spermatheca? in O. agricohi. All other species possessing 

 spermathec£e have this organ (one pair) situated in somite 

 ix. No spermathecal diverticula. Ovifore in xiv and 

 oviduct in the same somite, opening with the funnel in 

 xiii behind the ovary. No enlargement of the sperm duct 

 close to the male pore. Prostate with a long, narrow, 

 muscular tube. 



Buccal cavity extends through three somites and the 

 pharynx to the fifth, as in other species. The buccal 

 cavity of all species examined by me appears shorter, 

 though the want of septa makes the limits uncertain. 



The ivsophagus is widened at the junction of the 

 diverticula, which is not the case in the other species, 

 at least not to the same extent. The ciliated tubular in- 

 testine is narrower than the oesophagus, and differs in this 

 from other species, all of which have the oesophagus and 

 tubular intestine of more or less the same width. 



uVephridia degenerate in somites x and xi, as is the case 

 to a greater or lesser degree in other species, and the 

 posterior nephridia are enveloped in large peritoneal cells. 



Testes in somites x and xi. 



Habitat in soil, not in water. 



As will be seen from the above characteristics this 

 species differs from all others in having the spermathecal 

 in somite viii. It undoubtedly comes nearest to O. agri- 



