BOW ELL : ANATOMY OF VITREA SCHAEFFI. 



53 



number of turns does not seem to be increased. The vagina is long, 

 and divides into two branches above, one being bent upon itself and 

 going to join the oviduct, while the other forms an S-shaped duct for 

 the spermatheca. Judging by the tissue composition of these branches 

 they should be regarded as parts of the vagina proper. There is 

 a small eminence between their roots which may be the vestige of 

 a diverticulum. The spermatheca is spoon-shaped, but the flattened 

 side, which normally is attached to the middle of the epididymis, is 

 thinner and softer than the convex outer surface ; and this flattened 

 side is occasionally found distended, causing the spermatheca to 



Scale of millimetres. 



Fig. 1. 



assume a more globular form. The vagina is joined to the atrium 

 by a semicircular duct, provided with an oval glandular jacket. The 

 atrium or common duct itself is very short. The lower parts of both 

 male and female organs are in addition enclosed in a loose reticulum 

 of connective tissue, which in some specimens assumes the appear- 

 ance of a bag, similar to that which is found in the same place in 

 Vitrina, though not so well marked. The penis is remarkably long 

 and has two flexures; the part between the flexures is the penis 

 proper. The vas deferens joins the male organ not far from the upper 



