14 SPECIAL ANATOMY OF THE TERRESTRIAL 



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. 



Tebennophorus. 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 



