402 WILHELM MICHAETiSEN. 



This list contains twenty-five species and three varieties, 

 which are about twice as many as formerly known in this region. 

 Considei'ing the quantity of materal at my disposal, I expected 

 at the beginning of my studies, a larger gain of new species ; 

 but 1 soon perceived that the great majority belonged to 

 known forms. Indeed, there are only three new species nnd 

 three new varieties of old species in the list ; and one of the 

 new species, Fridericia peregrin abund a, is but a new 

 nomination for an oligochaste formerly described as a variety 

 of another species. The collection has, howevei', a consider- 

 able value, as it has enabled me to re-examine old species, such 

 as those of Kinberg, which were very imperfectly known. 



A reference to the list will show that many of the species 

 are peregrine, or non-indigenous, and were doubtless intro- 

 duced by man ; these have nothing to do with the real oligo- 

 chaste fauna. 



The foreign species are : two species of the genus 

 Fridericia of the family Enchytrajida?, the widely disti-i- 

 buted Pheretima heterochasta, the two species of Dicho- 

 gaster, the cosmopolitan Pontoscolex corethrurus, and 

 the two species of the Lumbricid genus Helodrilus. 



The locality of Eudriloides durbanensis Bedd. is some- 

 what doubtful. The headquarters of the genus Eudriloides 

 are the coast districts of British East Africa and German 

 East Africa. Beyond this region, Eu. parvus Mich. Avas 

 found at Quilimane at the mouth of the Zambezi River. 

 This species has been regarded as an outpost of the genus, 

 and we may perhaps in a like manner regard Eu. durban- 

 ensis as an outpost of the tropical African fauna continued 

 farther to the south. Similar outposts are known extending 

 as far south, such as Nemertodrilus kellneri Mich, from 

 the Orange Free State. This is likewise a member of the 

 Ethiopian sub-fam. Hudrilinfe, and allied to N. griseus 

 Mich, from Mozambique. The doubt about Eudriloides 

 durbanensis is due not so much to the improbability of the 

 locality, as to the manner in which it was found. The species 

 was not collected at Durban, but at Kew Gardens, in England, 



