OLIGOCHATA OF TROPICAL EASTERN AFRICA. 267 
value. In Eudrilus and the genera which are placed with it, 
the sperm-ducts are dilated into a round or oval sac before 
they open into the funnel. Michaelsen terms these dilatations 
“« Kiweisskapseln.”? These oval dilatations are absent in all the 
genera which I have placed in the second group. Paradrilus 
has them, and, as it also has at least one pair of calciferous 
glands, may perhaps be referred to the first group. Such 
dilatations appear to be absent in the genera Platydrilus, 
Megacheta, Metadrilus, and Notykus. These genera 
have, as has already been pointed out, no calciferous glands; it 
remains to be shown whether the integumental sense bodies are 
absent. Provisionally, therefore, I group the Eudrilidz! into— 
Sub-family 1. HEudrilineze.—Calciferous glands present. 
Integumental sense organs generally 
present. Funnels of sperm-ducts di- 
lated proximally. 
Sub-family 2. Pareudrilinz.—Calciferous glands ab- 
sent or greatly modified. No integu- 
mental sense-organs.* No dilatation of 
sperm-ducts. 
1 It is very possible that the structure of the nephridia will prove to 
separate these two groups. I have to some extent dealt above with the 
excretory organs of a few types belonging to the sub-family Pareudriline ; 
in these there is either a well-developed integumental plexus of tubules or 
traces of such. On the other hand, nothing of this kind occurs in any of 
the Eudriline. , 
2 Except in Hudriloides (occasionally). 
