SPECIAL ANATOMY. 209 
the entrance of the oesophagus. In L. campestris, the 
two glands are conjoined, so as to form a collar around 
the commencement of the stomach. 
The liver, by far the largest viscus in the body, 
occupies a position at the posterior part of the latter. 
It is of a brownish color, and consists of two principal 
lobes, an anterior and a posterior, which are further 
divided, the anterior into three or four, and the poste- 
rior into two lobes. Each lobe is composed of a number 
of lobuli held together by bloodvessels. From the con- 
vergence of branches, an hepatic duct is formed for each 
principal lobe, which opens in the side of the angle formed 
at the termination of the stomach in the intestine. The 
posterior cul-de-sac of the stomach usually contains some 
bile, which is a thin, glairy, drab-colored fluid. 
Arion. The digestive apparatus offers but little 
peculiarity from that of Limax. The retractor muscle 
of the buccal body is not so strong, and is divided into 
two lateral bands. The oesophagus is narrower and 
longer. In the form of the stomach and absence of a 
cul-de-sac to the small intestine, it resembles Limax 
campestris. The rectum, in its course to the pulmonary 
orifice, perforates the renal organ. 
Tebennophortjs. The buccal body has a conspicu- 
ous curve downwards, and the buccal pouch of the 
lingual lamina is longer than in Limax or Arion, and 
curves upwards from the postero-inferior part of the 
VOL. I. 51 
