38 LIMACID. 
Var. IV. vrupicola(L. and P.). Smaller ; dorsal band 
pale or wanting ; keel very gradually produced for two- 
thirds the length of the back, nearly black. 
Var. V: pdllens (L: and F.). Pale, dorsal line pale 
extending for two-thirds the length of the keel; mantle 
pale with almost invisible bands. 
Var. VI. alpéstris (LZ. and P.). Somewhat smaller, 
with a pronounced keel extending a quarter the length of 
the back, shield blackish, often obscurely banded ; back 
unicolorous with a pale median line. 
Var. VII. fiélva (Norm). Reddish brown suffused 
with black on the back ; shield reddish brown, scarcely 
obscured by small blackish specks. 
Genus.—Acriotimax Malm. 
Dr. Scharff says:—‘‘ Avrioltémax has only 4 convolutions in the 
intestines instead of 6, and these 4 are altogether different in position 
from those in Zimax. In the last genus the left lobe of the liver 
formed the apex of the intestinal one; in 4g7zolizmax it is the right. 
The species of Avrtolimax rarely possesses bands.” 
1. A. AGRESTIS (zzhabeting fields) Linné. Pl. I, f. 9. 
Very variable in colour and markings; shed/ oblong ; sme milk 
white ; Zezzgth 14 inches. 
This is the common ‘Field Slug” or “ Dew Slug,” 
which, unhappily, does not confine itself to its nominal 
habitat, but swarms everywhere, especially where its 
absence would be much appreciated. Its characteristic 
distinction is its mz/k-white slime. I once captured an 
