30 Newton^ on the Helices and Limaces. 



tozoa, both coiled and uncoiled, and in some instances form- 

 ing fasciculi. Occasionally there were found, mixed with the 

 spermatozoa, active molecules, or large transparent cells 

 (fig. d), which sometimes contained other cells, or granular 

 cells (fig. b). 



The tongue-shaped gland almost invariably presented 

 globules of all sizes (fig. d), together with a few rounded nu- 

 cleated cells, the globules being rendered opaque and granu- 

 lar by acetic acid. In one instance the globules were of a 

 uniform size, and soluble in acetic acid. 



The divertikel. — At the base of the tongue-shaped gland 

 the epididymis appears to double upon itself, so as to form a 

 complicated organ, which has been termed the " divertikel.^^ 

 It is tolerably certain that this forms the only connection 

 between the epididymis and the oviduct ; but the connectiou 

 could not be clearly traced. Injections of mercury passed 

 readily along the oviduct, but would not penetrate into the 

 epididymis. Keferstein and Ehlers C^ Kol. Zeitsch.,' vol. x, 

 1860, p. 269) are of opinion that the impregnation of the 

 ova takes place in the divertikel ; and this seems the more pro- 

 bable, as we sometimes find the eggs, covered with shells of 

 carbonate of lime, in the upper part of the oviduct. The ovi- 

 duct generally contained transparent globules of various sizes, 

 some being in groups ; occasionally, there were cells contain- 

 ing granular matter ; or molecules, which had a tendency to 

 run into chains (fig. e) ; or a few straight spermatozoa. lu 

 the H. aspersa, mentioned above, which was taken whilst 

 laying its eggs, the oviduct was distended with eggs, which 

 had calcareous shells. In H. pomatia a distinct coat of 

 irregularly interlaced muscular fibres could be traced. 



The lower or non-sacculated portion of the oviduct had 

 elongated, whip-like epithelial cells, in which, in some in- 

 stances, oval nuclei could be traced. The glandular portion 

 of the oviduct consisted of cseca, lined with a coarsely granu- 

 lar epithelium, which assumed various forms, and was ren- 

 dered transparent and displaced by acetic acid. Sometimes 

 the caeca contained fine granular matter, with oblong refract- 

 ing bodies. 



The spermatheca was lined with coarse, elongated epithe- 

 lial cells, which, in some cases, were produced into whip-like 

 cilia. Spermatozoa were only sometimes to be seen. In 

 one individual, which had just deposited its eggs, no sperma- 

 tozoa were found in the spermatheca itself, but there was a 

 mass of them in its duct. In the spermatheca of the indi- 

 vidual surprised whilst laying its eggs there were a consider- 

 able number of actively moving animalcules, of a fish-like 



