PART II. 

 TEREESTKIAL. 



Order. PULMONOBRANCHIATA (continued). 

 Family /. LIMACID^E (Slugs}. 



The bodies of the Limacidce are straight, not coiled ; 

 the upper part of the back is covered with a fleshy 

 shield or mantle, under which the shell, if any, is 

 located. This shell is rudimentary, and is usually 

 an oblong plate, more or less membranaceous. They 

 have four tentacles similar to those of snails, the longer 

 or upper pair terminating in bulbs in which the eyes 

 are situated. The whole lower surface of the body 

 forms the foot. They have a respiratory orifice 

 situated on the right side of the body by the edge of 

 the mantle. 



Genus I. ARION. 



All the Arions have a slime gland at the extremity 

 of the tail. 



