PACIFIC COAST OLIGOCH MTA, 8Y 
with very oblong nuclei (fig. 105 ep.). This epithelium is thickened only at the 
anterior side, nearest the narrow tube (fig. 104), but narrows quickly both superiorly 
and posteriorly. The inner transverse muscular layer is similarly thickened in this 
region (fig. 105, ¢. in.). 
The storage chamber contains the same general layers as the narrow bridge. 
The inner lining epithelium is narrow, with very compressed nuclei, with the flat side 
lying against the muscular wall (fig. 107). 
The nature of the prostate differs apparently much from that of the prostates of 
some members of Lumbriculidee, especially Sutroa, as lately more minutely described 
by Beddard, but more resembles in structure Lumbriculus. But I am more inclined 
to compare its makeup with the prostate of Moniligaster. In Eelipidrilus the pros- 
tate contains the characteristics of both Limicole and Tericole, if I may yet use the 
expression. The inner two-celled layer of the prostate which is characterizing most 
higher earth worms, possessing a prostate, is superposed by the layers, muscular and 
glandular which characterize Tubifex, Moniligaster, ete. 
Spermducts. IT am now able to describe the spermducts for the first time. 
They enter the storage chamber of the prostate near to the bridge and close to- 
gether, but. still entirely separate (fig. 95), and when the inner surface of the 
chamber is viewed from above the entrance pores are seen as two small slightly ele- 
vated papillae (fig. 95 sp.) From these the spermducts, which are of very minute 
size, run forward parallel to the prostate, one on either side, except alongside of the 
bridge where they run close together. The outer pair leave the prostate in xi, dip 
down to the ovaries in which they are partially engaged and push their ciliated 
rosettes through septum x/xi, the rosettes opening in x. The inner spermducts are 
similarly engaged in the gonads in x, push through septum ix/x and open their 
rosettes in ix, all very close to the body-wall. 
The rosettes are only one cell thick, very thin and_ flat, with the posterior sur- 
face attached to the septum, the anterior lip only being free. Only the inner deeper 
surface of the rosettes is ciliated. 
Sperm-sacs, one on each side and continuous from the beginning of the sperm- 
atheca, reach as far back or further than the posterior end of the storage chamber of 
the prostate. Generally the sperm-sacs reach two or three somites further back. 
Each sac is separate from the other and consists of one continuous bag contracted 
somewhat at the septa. It is not racemose and does not connect with the septa as in 
so many of the higher forms, but greatly resembles those of Sutroa. The sperm-sac 
only covers the prostate, but does not properly enclose it, as it does not extend to the 
space between the prostate and the intestine. With the latter, however, it is con- 
nected by two continuous walls of connective tissue, one on the dorsal and one on 
the ventral side of the intestine. In the enclosure thus formed the prostate, as well as 
the upper part of the spermatheca, lies free. 
In the posterior parts of the sperm-saes are always seen very large sacs of yolk 
granules. In one specimen I found a mass of these yolk granules surrounding the 
