470 FRANK KE. BEDDARD. 
glands in segments x and x1. These glands are not, as is 
so often the case, connected with the lumen of the esophagus 
by a narrow duct; they present the appearance of swellings of 
the esophagus and resemble very closely the calciferous glands 
of Microcheta (Beddard, Benham). Though probably formed 
as two paired outgrowths of the esophagus no trace of a paired 
arrangement is visible in the adult worm. 
The nephridia, as already stated, are paired; the funnels, 
as is nearly always the case, open into the segment anterior to 
that which bears the external orifice. I reserve for the present 
details as to the structure of the nephridia. 
Genital Organs.—The sperm-sacs are in segments Ix, x, 
x1, and xm. The vasa deferentia open into segments x 
and x1; the two vasa deferentia unite to form a single tube, 
the relations of which with the atrium I have not been able to 
make out with certainty. I believe, however, that it does not 
open on to the exterior independently of the atrium; there are 
no conspicuous penial sete, but it appeared to me, in one speci- 
men which I investigated by means of sections, that one or two 
of the sete in the immediate neighbourhood of the genital 
pore were rather larger than the others. 
The ovary is in segment x11, and the oviduct opens into 
the same segment; there is nothing unusual about either of 
these organs. The ovary, as in most Earthworms, is not a com- 
pact organ, but is prolonged into numerous filiform processes. 
The egg-sacs (receptacula ovorum) are very conspicuous 
structures; they lie upon the posterior surface of the septum 
separating segments x111 and xiv, and on either side of the 
intestine. 
These organs are larger than is generally the case, and have 
a racemose appearance ; in both these points they present an 
interesting resemblance to sperm-sacs; furthermore they con- 
tain numerous Gregarines. 
In one specimen, the genital region of which I investigated 
by transverse sections, the structure of the egg-sacs was a little 
different from that of other Earthworms which I have had the 
opportunity of studying. The walls (see fig. 12) are tolerably 
