STRUCT ORE OF THREE NEW SPECIES OF EARTHWORMS. 121 
figure or describe the funnel of the vas deferens ; I could only 
ascertain that it became continuous with the seminal reservoir 
(erroneously termed “ testis 5 ’). I have since discovered the 
funnel by means of transverse and longitudinal sections. 
The seminal reservoir appears to perforate the mesentery 
which divides segment 8 from 9, and to lie in both of these 
segments (see diagram, PI. XII, fig. 12). I am inclined to 
believe that this appearance is produced by a bulging of the 
mesentery, which is thin and delicate, and that the seminal 
reservoir really lies in segment 8 attached to the posterior wall 
of that segment. Its cavity is not divided up by anastomosing 
trabeculae as is the case with Lumbricus, &c. The funnel 
of the vas deferens opens into the interior of the seminal 
reservoir, and it is important to observe that the funnel 
is very simple in form as in many Limicolae, and is 
not folded and plaited as is usually the case in Earth- 
wo rms. 
There is some discrepancy between my account of the 
anatomy of Moniligaster Barwelli and M. Perrier’s 
description of M. Deshayesi; this discrepancy is indeed too 
great to be explained away on the grounds that the species 
investigated were different. 
In a recent paper Dr. Horst has described a third species, 
M. Houteni; a study of this interesting paper gives me more 
confidence in restating my own results, which I have every 
reason now to believe are substantially correct. 
Moniligaster, therefore, in respect of its efferent ducts, is 
nearer to such Limicolse as Stylaria than any other Earth- 
worm. 
Having shown that the male reproductive ducts and the 
accessory organs of the aquatic Oligochgeta are repeated down 
to the most minute detail in Moniligaster, it remains to be 
seen how far they are represented in other Earthworms. 
Yejdovsky has pointed out in his great work on the 
anatomy of the Oligocliseta (19) that the prostate gland of 
Pontodrilus is probably the homologue of that of Eudrilus. 
On the other hand, he regards the prostates of Perichseta, 
