208 MR. F. E. BEDDARD ON EARTHWORMS [Jan. 14, 
and P. hesperidum. I am able now to alter this list, by removing 
P. bermudensis, which I have received from Hong Kong *, and also 
adding to the first list P. violacea and P. sinensis, which I have received 
from Trinidad and Grenada, and to the second the two new species 
described in this paper. The first list will then contain eight species, 
and the second eight. Seeing the large number of species which 
have been in all probability introduced into the West from the East, 
it is in my opinion by no means to be taken for granted that the 
genus Pericheta is indigenous in the West Indies and South America. 
I am disposed to look upon it as a distinctly Oriental genus. 
ACANTHODRILUS MACQUARIENSIS, n. sp. 
Of several specimens of this apparently new species only two 
were sexually mature. 
It is a small species, measuring about an inch in length, and 
consisting of some 100 segments. 
The prostomium is incomplete, not dividing the peristomial 
segment. 
The sete are distant from each other, but not equally so. The 
two ventral of each side are more closely related than the two 
dorsal. The actual distances are much as indicated in the 
following scheme : 
ea aS ea) lite Me 
for the anterior segments of the body. Behind the clitellum the 
distance separating the two ventral sete is about half that which 
separates the two dorsal. Towards the xviiith segment and on 
both sides of it the two sete of each ventral couple get closer 
together, and on the xvilith segment these setz are closer together 
than anywhere else. A similar convergence of the sete towards 
the segment bearing the male pores has been noticed in various 
species of the genus Microscolex. On the xviith and xixth segments 
the ventral sete are altogether absent, being replaced by the penial 
sete. 
The nephridiopores open in front of seta 3. 
One of the two sexually mature individuals had no papille ; upon 
the other there were a pair of these structures corresponding 
in position to the ventral sete. One of them was evidently 
abnormally situated, for they were upon different segments, the 
right-hand one upon the tenth, the left-hand upon the eleventh 
segment. The clitellum occupies segments xili.xvi., commencing 
at about the middle of the former segment. It is continuous 
across the ventral surface except perhaps for the last of the seg- 
ments over which it extends. 
The oviducal pores are paired, and upon segment xiv. each lies 
in front of seta 1. 
The male pores (on xviiith) are to the outside of seta 2. The 
spermiducal gland-pores correspond in position to the outer seta 
4? 
1 Typical specimens, not doubtful P. hawayana ; see pp. 202-203. 
