LIMAX. 45 



Genus III. LIMAX. 



None of the members of this genus are furnished 

 with a slime gland. 



The members of this genus differ from the Arions 

 in having their respiratory orifice nearer the posterior 

 margin of the mantle. 



1. L. GAGATES (jet). 



Almost as varied in colour as A. ater ; its charac- 

 teristic distinction is in the mantle being bilobed when 

 the animal is extended. Length two and a half inches. 

 It is found in many parts of the country among vege- 

 table matter like other slugs, but it is local. 



* 



2. L. MARGINATUS (margined). 



This mollusk is characterized by its strong carination 

 from the mantle to the end of the tail. It is of various 

 colours yellowish, rufous brown, or, more usually, pale 

 slate grey; two and a half inches in length. The shell 

 is remarkable for its thickness. I have taken some in 

 the Isle of Man nearly cubical in form. It is a common 

 species on stone walls in the country, and is very active 

 after rain. 



