DESCRIPTIONS OF GENERA AND SPECIES 



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present upon the body- wall of other genera; the difference is that the region of the 

 body upon which the copulatory glands and setae are developed is drawn out into 

 the' two penes. 



Brachydrilus, though peculiar in possessing two pairs of nephridia in each 

 segment, agrees with Microchaeta perhaps more closely than it does with any other 

 genus ; it is the only other member of this subfamily which has a pair of calciferous 

 glands, and it has apparently a series of glands without modified setae attached, 

 such as are found in Microchaeta benhami. 



I place Hormogaster in this subfamily not without misgivings; its relation to 

 other Geoscolicidae have been already dealt with. 



Genus CEiODRiLirs, Hoffmeistek. 



DBFliTiTiOBr. Setae paired, ornamented. Clitellum, XIV-XLV (?). Male pores 

 on XV. Anus dorsal in position. Gizzard and calciferous glands absent. 

 Nephridia commence in X. No dorsal pores. Spermathecae absent. No 

 spermiducal or copulatory glands. 



4 Q 



