SPECIAL ANATOMY. 217 
the transverse bands surround the stomach, all being 
much too short. They are indistinctly granular in struc- 
ture, and each contains one or two elongated nuclei. 
The lobules of the salivary gland are composed of the 
dilated commencements of the ducts, lined 'with soft, 
granular cells, which are oval in form, and contain a 
round, granular nucleus with a minute nucleolus. The 
basement membrane of the salivary ducts is amorphous. 
The epithelial cells lining the trunks bear considerable 
resemblance to those found in their follicular commence- 
ment. Outside of the basement membrane, twine nar- 
row, muscular fibres in various directions. They are 
nucleated, and where the nuclei exist are wider than at 
the intervening parts. 
The lobuli of the liver are composed of the rounded 
commencement of the biliary ducts, and are lined with 
polygonal cells, which become globular on the removal of 
pressure. The hepatic cells contain a fine, granular 
matter, fine and large oil-globules, and a round, nucleo- 
lated nucleus. 
Chapter vi. — of the generative apparatus. 
All the terrestrial Gasteropoda under consideration are 
monoecious, or hermaphroditic, though none are capable 
of self-impregnation. They are also all oviparous. 
Limax. The testicle is a round, or oval body, par- 
tially concealed by the liver ; it is brown in color, and 
