LIMAX. 47 
situations as the rest of its tribe in many parts of the 
country. 
6. L. TENELLUS (tender). 
About three-quarters of an inch long, slender, shell 
; 4 
oval, moderately thick. 
This slug has been found in Shetland and North- 
umberland. 
7. L. Arporum (inhabiting trees). 
L. arborum varies very much in colour, and is some- 
times very beautifully marked. Length three inches. 
Its distinctive feature is the blunt point of the mantle 
behind. The shell is nearly oval, very thin and glossy. 
The nucleus is nearly terminal, the margin broad, and 
membranaceous. 
It derives its name from its habit of climbing trees, 
a habit which, in common with members of the animal 
kingdom of a much higher development, it particularly 
affects in its youth. It is often found disporting itself 
by a thread of mucus which is attached to a branch. 
Though found in most parts of Great Britain and 
Ireland, it is not abundant everywhere. 
8, L. mAximus (largest). 
This is a very handsome animal, mottled all over 
