DEVELOPMENT AND ANATOMY OF SOME EARTHWORMS. 11 
On Certain Points in the Development and 
Anatomy of some Earthworms. 
By 
Alfred Gibbs Bourne, D.Sc., 
Professor of Biology in the Presidency College, Madras. 
With Plates 2—5. 
Tue following notes are selected from a more extended 
series of observations which I am making upon this subject, 
and would not have been published separately, but that I 
wished to take this opportunity of testifying to my regard for 
one who has been for so long, and still is, my teacher and 
friend. 
Much of the literature of the subject has not yet reached me 
(including the later portions of Vejdovsky’s ‘ Entwickelungs- 
geschichtliche Untersuchungen’), and I have been obliged to 
defer any detailed reference to it until a future occasion. The 
organs dealt with are the sete and the nephridia, and I have 
added a synoptical description of the two new species of worms 
with which the paper chiefly deals. 
New SPECIEs. 
The two worms, Mahbenus imperatrix and “ Peri- 
cheta” pellucida, both belong to the family Perichetide, 
but neither of them to the genus Pericheta. For the one I have 
founded a new genus, being fairly confident as to what constitute 
its generic characters; for the other I have abstained from so 
doing, as it is, I think, allied to some of the new species de- 
scribed by Fletcher, while it is the only representative of the 
