404 WILHELM MICHAELSEN. 



many species in the Cape province, one in the Transvaal, 

 several in Natal and one in Zululand. In the southern parts 

 of South America there are many species in South Patagonia, 

 Fireland, Falkland Islands, and Chile northwards as far as 

 Coquimbo. The only known species which occurs elsewhere 

 is Chilota exul (Rosa) from the Cape Verde Island, San 

 Antonio ; but it is very doubtful if it is an indigenous species 

 there. The South African group of Chilota is accompanied by 

 the single species of the genus Udeina (U. kinbergi {Mich.}), 

 from the banks of the river Yaal, whilst that of South America 

 is living together with the allied great genus Yagansia. 



This group of Chilotacea of Natal and Zululand con- 

 sequently forms an integral part of the typical South African 

 fauna, and especially exhibits the singular faunistic connec- 

 tion between the southern corners of the two continents of 

 Africa and South America. 



(2) Sub-fam. Ocnerodrilinas. — This group is represented 

 by a single species of the genus Kerria, occurring in the 

 meantime as far north as Pretoria, Transvaal, and a single 

 species of Ocnerodrilus (Ilyogenia). 



The sub-family Ocnerodrilina^ is a typical Ethiopian 

 group, and all the known genei-a are represented in the 

 tropical regions of Africa. But it is not restricted to Africa, 

 and just these two genera found in Natal, viz. Kerria and 

 Ocn erodrilinus, are also found in the tropical parts of 

 South America, Central America, and West Indies. 



In the Cape Province no Ocnerodrilinas have been found. 

 In the eastern districts Natal appears to be the southern limit 

 of this sub-family. In the more western districts the southern 

 limit is further north; Py gmEeodrilus arausionensis 

 Mich, occurs at Bathville in the north of the Orange Free State, 

 and there are some species in German South-West Africa. 



This second group of the oligochaste fauna of Natal thus 

 includes an outpost of the fauna of tropical Africa, which has 

 extended to the south-east of the continent; and it is also 

 related, as we have seen above, to the fauna of South 

 America, Central America and the West Indies. 



