282 W. B. BENHAM. 



Ovipores on Somite xiv. 



Nephridiopores in line with inner couples of setae. 



No peiiial setee. 



The septa, xiii/xiv and xii/xiii, are fused together except 

 below the intestine, so that Somite xiii is almost obliterated. 



There is a connection between the oviduct and " sperma- 

 theca " of each side ; in fact, the so-called spermatheca appear 

 to be a greatly elongated ovisac, which has, as Michaelsen 

 suggests, taken on the function of spermatheca (see Poly- 

 toreutes). Apart from this the genus somewhat resembles 

 E-hododrilus. 



Species. — N. griseus. 



4. Callidrilus. 



Setse in four couples. 



Clitellum only developed ventrally on Somites xvii to xxi. 



Male pores paired on Somite xvii. 



Spermathecal pores numerous, between Somites xiii/xiv. 



Ovipores on Somite xiv. 



Nephridiopores in line with inner couple of setse. 



Numerous paired copulatory pits are present on Somites 



XI to XXIV. 



Spermathecse in the form of small sacs; a dozen in 

 anterior of Somite xiv [cf. Brachydrilus]. 

 Species. — C. scrobifer. 



5. Polytoreutes. 



Setae separate, eight. 



Clitellum on Somites xiii to xviii. 



Male pore median on Somite xvii. 



" Spermathecal" pore median, single, on Somite xix. 



Ovipores paired on Somite xiv. 



No penial setse. 



Each prostate is very long, and provided with two rows of 

 small contiguous diverticula along its whole length. The two 

 prostates unite on Somite xvii. The ''spermatheca" is a 

 median sac passing forwards from its pore in Somite xix to 



