26 ARIONIDA. 
Var. I. aurantiaca (Loc.). Brilliant orange. 
Var. II. briinnea (Lehm.). Unicolourous brownish, the 
bands being obsolete. 
3. AR{ON MfNIMUS (smallest) Stmroth. PI. 1., f. 2. 
Body light grey or whitish, tinged with lemon-yellow, with faint 
indication of a lateral band down each side ; rzgosztzes pointed, 
arranged in longitudinal rows ; sazd/e granulated, banded like the 
body ; foot-sole yellowish ; sZ/me yellow ; length 20 to 23 mm. 
This species has been lately differentiated by Dr. Scharff, 
“Journal of Conchology,” vol. vi, p. 267 (Oct., 1890). 
Mr. W. Denison Roebuck and others had, however, before 
this discriminated it from its congeners, but without 
venturing to accord it specific rank. Dr. Scharff, in the 
article above referred to, says :—‘‘The wrinkles on the 
body form the chief characteristic of this interesting little 
slug. These, when examined by a lens, are found to 
possess pointed projections, which cause a peculiar glit- 
tering appearance when the light falls on them. These 
little spikes, which I have not noticed in any other form, 
are only seen when the animal is at rest. The body is 
then generally drawn up in a semi-circular position, which 
is so often assumed by Arion ater . . . but never 
seen in other slugs . . . asregards its habitat, Avion 
minimus is peculiar to the open country . . . fungi 
appear to be their natural diet.” 
Mr. Roebuck has recorded it for most parts of Great 
Britain. It is a common species everywhere. 
