268 FKANK E. BEDDAED. 



Pontoscolex ( = Uroch8eta). 

 Diachaeta. 

 Onychochseta. 

 Trichochseta. 



Rhinodrilus ( = Thainnodrilus). 

 Anteus. 



Geoscolex ( = Titanus). 

 Urobenus. 

 These genera agree to diflfer from the next family in the 

 following points ; 



1. Spermatothecse one to four pairs, placed in neighbour- 

 hood of gizzard. 



2. No copulatory papillae. 



Besides these characters, which are absolutely distinctive, 

 there are others which are found in this family but not in the 

 next — e. g. prostomium sometimes absent ; setse often orna- 

 mented, particularly upou the clitellum ; peculiar glandular 

 diverticula connected with the posterior nephridia ; setae often 

 irregular in arrangement; sperm-sacs maybe one pair, very 

 long; egg-sacs absent (this is perhaps characteristic of the 

 family). 



These genera are, with the exception of Pontoscolex, con- 

 fined to the New World; the genus Pontoscolex is so 

 ubiquitous that it can hardly be safely assumed that its presence 

 in the tropical parts of the Old World is due to man's agency. 

 The second family, Microchaetida^, will include these genera : 



Microchseta. 



Brachydrilus. 



Bilimba. 



Kynotus. 



Glyphidrilus. 



Callidrilus. 

 These six genera agree in the following assemblage of 

 characters : 



1. Spermatothecae usually many small pouches in a segment, 

 placed in the neighbourhood of the ovaries. 



2. Copulatory papillae present in nearly every case. 



