76 EARTHWORMS AND THEIR ALLIES [oh. 



Euscolex, Metascolex, Beddardiella,Gardullaria^\t\\ 

 only one species to each genus, Bettonia with three 

 species, Teleiidrilm with 15 species, Polytormtus 

 with 22 species, Iridodrilus with two, Malodrilus also 

 with two, Neumanniella with eight, Eupolytoreatus 

 with two and Teleutoreuttis with only one species. 



This completes the list of the Eudrilidae. We 

 will take the huge family Megascolecidae next ; and 

 we find in tropical Africa that the genus Dichogaster 

 alone contains at least 93 species confined to Africa, 

 as well as a few which it shares in common with 

 America, and the common and widely spread D. bolavi 

 which has even made its way to Europe. Of the sub- 

 family Ocnerodrilinae we have the genus Gordiodrihis 

 with seven species, a genus which also occurs in 

 Madagascar and the West Indies : Nannodrilus with 

 three species, Diaphorodrihis with one species and a 

 few examples of Ocnerodrilus and its sub-genera, some 

 of which are also forms that occur elsewhere in the 

 world, for example Nematogenia panamensis. Of 

 Pygmceodrihis there are eight or nine species. 



Of the sub-family Acanthodrilinae the Cape region 

 of South Africa harbours some seven species of the 

 genus Notiodrilus, of which one however is a West 

 African form. The allied Chilota has 13 species, and 

 there is a peculiar genus Holoscolex near to Yagansia 

 with one species. We next have to deal with the 

 Geoscolecidae, of which a sub-family, Microchaetinae, 



