- 
230 FRANK E, BEDDARD. 
In the latter genus, however, Michaelsen was unable to see 
the nephridiopores, but found (by transverse sections) that 
the nephridiopores were placed in the neighbourhood of the 
ventral sete. It seems to me to be possible that in these 
species there are nephridia of the type which characterise the 
genera Libyodrilus and Pareudrilus. When the nephridia 
are of the usual form, the orifices are so conspicuous that it is 
almost impossible to overlook them. In these three genera, 
moreover, as well as in Libyodrilus, the atria are compara- 
tively short and have very muscular walls. These are addi- 
tional points of resemblance to Pareudrilus. Pareudrilus 
differs from Libyodrilus mainly in the form of the female 
reproductive apparatus, and in the absence of the three poste- 
rior gizzards. With Metadrilus, the genus Pareudrilus 
agrees in the position of the spermatothecal orifice. But in 
Metadrilus the spermatothece are much reduced, and there 
are besides only the rudiments of penial sete. The affinities 
of Pareudrilus are with the genera mentioned, but no one 
of them can be said to be much nearer than the others. 
Polytoreutus violaceus, n. sp. (figs. 3, 7). 
Two species of the genus Polytoreutus have been at pre- 
sent described. The type species of the genus, P. ceruleus, 
was described briefly by Michaelsen in a preliminary account 
of the earthworms of Zanzibar and the opposite mainland,! 
and subsequently re-described in a more thorough fashion." 
A second form, P. magilensis, was afterwards described by 
myself from Magila, Hast Africa. I have now to add a third 
species, which I name P. violaceus, on account of the colour 
of the worms. 
There were four examples of this species in the collection ; 
all of them were fortunately sexually mature, and all of them 
were about the same size. The length of one individual which 
was selected for measurement was 83 mm., its diameter 4 mm. 
1 Loc. cit. (on p. 201). 
2 “Some New Species and Two New Genera of Karthworms,”’ ‘ Quart, 
Journ, Mier. Sci.,’ vol. xxxiv, 
