2G0 
FRANK E. REDDARD. 
gations round certain parts of the nephridia, are exactly like 
those which surround the nephridia of Pontodrilus, as well 
as of Phreoryctes. Perrier was the first who drew attention 
(23) to the resemblances in this particular between the nephridia 
of Pontodrilus and those of the “ Limicolae ; ” and Dicho- 
gaster is another instance of an Earthworm which so far ap- 
proximates in the characters of its nephridia to the “ Limicolae/’ 
III. Further Remarks on the Nephridia of 
Earthworms. 
The Nephridia of Perichaeta aspergillum. — With re- 
gard to the nephridia of Perichaeta aspergillum, I am able 
to make some additions to my former papers upon this genus (1). 
The most important point which I was then able to prove is 
that the nephridiopores, instead of being present to the number 
of only one pair in each segment, are extremely numerous. 
I stated (1, p. 401) that there were often four or five nephridio- 
pores lying between two setae, making, therefore, a total of 
from one to two hundred in each segment. I have figured and 
described these nephridiopores as forming a continuous row 
round the middle of each segment. After discovering that in 
Dichogaster the nephridiopores are not limited to the spaces 
between the setae of a segment (v. suprh, p. 259), I carefully 
re-examiued Perichaeta aspergillum with reference to this 
point ; the result of this re-examination is to show that P. 
aspergillum resembles Dichogaster. The nephridio- 
pores are scattered irregularly over every part of 
the body, and are not by any means confined to the 
area lying between the setae of a given segment. 
Ciliated Funnels. — Another fact of some little importance 
which I am able to add to my former paper upon Perichaeta, 
is the description of ciliated funnels. In the posterior region of 
the body the funnels were extremely obvious although small; 
the small size of the ciliated funnel corresponds to the small 
calibre of the excretory tubules. These structures were ob- 
vious, for the reason that, as a general rule but by no means 
