36 Proceedings of the Royal Physical Society. 
the ixth segment, and open on to the internal viii./ix. Each 
has two diverticula, one directed forwards and the other 
backwards. They arise of course from opposite sides of the 
duct of the spermatotheca. 
The arrangement of the species belonging to the family 
Cryptodrilide is not by any means easy. This is doubtless 
partly due to imperfect knowledge. Fletcher,’ for example, 
has not always described in a manner sufficiently clear the 
characters of the atria, which I believe to be of some import- 
ance in the grouping of the species. The species placed by 
him and by Spencer? in the genera Megascolides and 
Cryptodrilus evidently require some rearrangement. I do 
not, however, propose to offer here any amendments as far as 
concerns those genera. Lhododrilus*® differs principally in 
that the male pores are upon the xviith instead of the xviiith 
segment. It evidently comes near to Microscolex. The 
description of the new species seems to me to reduce the 
distance to such infinitesimal proportions that Lhododrilus 
must be merged in Microscolea. I defined* Microscolex in 
terms which must now be slightly altered so as to include 
Rhododrilus minutus. The amended definition may run 
thus :— 
Microscouex, Rosa. 
Microscolex, D. Rosa, Boll. Mus. Torino, vol. ii., No. 19. 
Rhododrilus, F, E. Beddard, P.Z.S., 1889, p. 380. 
Sete eight per segment. Clitellum xiii. (xiv.)—xvi. (xvii.), 
complete ¢ pores on xvii. No dorsal pores. Alimentary canal 
with or without gizzard, without calciferous glands; no typhlosole. 
Nephridia paired, commencing in one of segments ii.-v. Atria 
tubular, with or without penial sete ; spermatotheca one or four 
pairs, with a diverticulum. 
Distribution.—Italy, Madeira, Algeria, Argentine, Australia, | 
New Zealand. 
1 In his series of papers upon Australian Earthworms in the Proceedings 
of the Linnean Society of New South Wales. 
2 Proc. Roy. Soc. Vict., 1892. 
> F. E. Beddard, On the Oligochetous Fauna of New Zealand, etc.— 
P.Z.S., 1889, p. 380. 
4On the Earthworms collected in ‘Algae and Tunisia by Dr Anderson— 
P.Z.S., 1892, p. 36. 
