Anatomy and Affinities of Ilypsobia nosopliora. 



411 



The author was at one time inclined to tliink that a 

 connection existed in Ilypsobia between the upper portion of 

 the " uterus " and the oviduct in the neighbourhood of the 

 receptaculum. But the connection between the two organs 

 at this upper level, which was found in one or two examples 

 only, appeared to be fortuitous, and, in any case, there was 

 no continuous passage from the cavity of the oviduct into that 

 of the " uterus." 



Arising at a high level (occasionally adjacent to the lower 

 end of tlie ovary) an extensive gland is found which passes 

 downwards and eventually appears as an elongate mass on 



Fig. 7. 



Jl. no!iop1tora ( X 4 oc. X obj.). DiagTammatic transverse section 

 throiigli median region of pallial cavity. 



o = ovifluct; r = rectum; i; = " uterus." 



the right-hand side of the last whorl. It has a continuous 

 cavity throughout the whole of its length, which opens to the 

 exterior close to the anus and oviducal pore in the anterior 

 right-hand corner of the mantle-cavity. 



It is impossible to discuss the identity and function of this 

 gland without appropriately fixed material. It is evident, 

 however, that it is divisible into two parts — an upper, wholly 

 glandular portion, and a lower portion, less glandular, with a 

 more capacious lumen and the remarkable feature of a well- 

 developed muscular sheath imbedded in the glandular tissue. 



