310 Rev. M. J. Berkeley o}t HeJicoUmnx Lainarvkii. 



llie biliary duct, though I have i\o doubt that they are the same in the 

 two. The general rippearance and comparative length of the rest of the 

 intestine are nearly the same. 



Again, with respect to the organs of generation we have the ovary, 

 oviduct, matrix and " vessie''* the same, only the common receptacle of 

 the two last is become stronger and more muscular. The testicle and vas 

 deferens again are precisely the same. The principal points in which the 

 two genera differ, are, that there is no process of the dart as in Helix, 

 except bttter opportunities of investigation should prove that the 

 muscular body above mentioned, serves this purpose, in addition to its 

 other functions, but even then its position would be widely different 5 

 there are also no muhiplied processes or any appendages; and the body 

 of the penis is bulbiform. instead of flagelliform ; and its general struc- 

 ture is described above somewhat varied. 



With Parmacella it agrees in almost every point, except that it has no 

 appendages to the penis ; that it has not the additional ganglion marked 

 t. . in Cuvier's figure of Par??tflce//a, and that in Pannace^/a there 

 are two distinct muscles for the retraction of ihe mass of the mouth, 

 instead of one. Cuvier has not indeed given any account of the interior 

 of the organs of generation, but the outward appearance is so similar 



* In iirei/«^rt.';'eMa there is another organ besides the " vessie," whose use I 

 am vinacquainted with, equally as with that of the " vessie" itself. I have not 

 been able to examine the Helix Pomatia, from which Cuviev's dissections are 

 taken, and cannot tiierefore say whether it exists in that also, but conclude that 

 it does not as he takes no notice of it, nor is there any indication of it in the 

 figures: in Ihlix osjicrsa it is so prominent as to strike any one immediately 

 who is tracing the course of the tube which leads to the " vessie." Not only 

 is there a tube given off from the point where the matrix enters the common 

 cavity, to bear the "vessie"; but this tube at some distance from its origin is 

 forked, and one of the divisions, that of the " vessie" on the right hand, the 

 smaller of the two, runs along the side of the matrix opposite to that which 

 bears the narrow portion of the testicle, while that on the left, after curling 

 about twice or thrice, at length is attached to that portion of the teiticle, at 

 about the middle of its course, accompanies it almost to the end of the matrix, 

 and there ends obtusely, forming (as it were) a sort of cfecum to the tube of the 

 " vessie." 



