The Classification and Distribution of Earthworms. 255 



The female apparatus is unique by reason of the fact that 

 the oviducts are higlily muscular tubes, that they are con- 

 tinuous with the ovaries, and that the spermatheca3 are 

 diverticula of them. The ova themselves have a somewhat 

 peculiar structure and history.^ 



Teleudrilus is less peculiar than Eudrilus. 



The minor peculiarities to which I have referred are (1.) 

 the presence of peculiar bodies in the epidermis, possibly 

 identical in their nature with certain problematical struc- 

 tures in Urochmta ;'^ (2.) the presence of unpaired calciferous 

 glands, as well as paired ones, lying beneath the oesophagus. 

 It is only by omitting to notice these peculiarities that Eosa 

 has forced this genus into his family Eudrilidse ( = my 

 Cryptodrilidse minus Eudrilus and Teleudrilus). 



It does not appear to me possible to include these two 

 genera in my group Acanthodrilini at all ; they are evidently 

 isolated types, whose affinities at present cannot be regarded 

 as certain.^ 



In the meantime, pending the discovery of intermediate 

 forms, I put them in a group by themselves, which will be 

 defined as follows : — 



Group II. EUDRILINI. 



Definition. — Earthworms with regularly paired nephridia, 

 furnished with atria and a terminal copulatory appara- 

 tus of a peculiar nature. Oviducts continuous with the 

 ovaries, and opening generally in common ivith the 

 spiermathecce. 



^ On the Structure and Development of the Ovum in an Annelid {Eudrilus) 

 — Jour. Anat. Phys., vol. xxii., p. 9. 



2 Perrier, Arch. Zool. Exp., t. iii., 1874, p. 331. 



2 Since writing the above I have received Dr Michaelsen's most recent 

 paper, which contains a description of some most interesting forms belonging 

 to this group (JB. Hamb. wiss. Anst, vii,). I have placed the various genera 

 in what I believe to be the proper places in my scheme, but I make no other 

 alterations in the text. I do not regard Eudriloides as a link between 

 Eudrilini and Cryptodrilidie, although its single unpaired spermatheca 

 is in the ovarian segment. This peculiarity is met with among the Geo- 

 scolecini. 



