168 
Transactions of the Society. 
The genera which possess only one 'pair of testes and sperm-sacs 
— which are the chief characters on which we can rely in the case of 
the present worm — are Geoscolex, Urochseta, Biachseta (which I have 
grouped together as a family Geoscolecidae, separated from the 
Bhinodrilidae by the above character, by the separation and alternation 
of the setae, and other minor characters). 
With these genera Eminia shows considerable agreement. In 
Biachseta the testes have the same position as in Eminia , in somite 
XI. The gizzard is in somite VI ; a large pair of peptonephridia, 
resembling those of Eminia , have a similar position ; but in Biachseta 
(though in B. Windlei there are modifications of the oesophageal wall), 
no distinct calciferous glands occur, nor is the nephridium provided 
with a “ caecum ” ; the setae are moreover characteristically scattered 
and alternate. 
From Urochseta and Geoscolex, where the setae are posteriorly 
scattered and alternate, Eminia also differs in the position of testes, 
in number and position of calciferous glands, and in position of gizzard. 
The nephridia of Urochseta are unlike those of Eminia, which 
however resemble those of Geoscolex, although the peptonephridia of 
the two are alike. The nephridiopores have the same position in the 
two genera. 
This Central African earthworm is therefore a new genus ; it agrees 
more closely with the Geoscolecidse than with the Bliinodrilidse, and 
perhaps serves to connect the two families. It is difficult to say — till 
we can obtain fully developed specimens — to which genera Eminia is 
most nearly allied. I thought at an early stage of my examination of 
the worm that Eminia might be a young stage of Urochseta, in which 
the characteristic arrangement of the setae at the posterior end of the 
body had not yet been acquired, but a comparison of the nephridia 
and their funnels and other structures showed me that the two are 
distinct. 
It is most unfortunate that this is the solitary specimen collected ; 
if a few others had been collected at the same time we might have 
been able to fill in the gaps which at present must remain as such. 
