256 
MOLLUSCA. PULMONIFERA. 
Arion. 
LOIACID^.. 
Gen. XIII. ARION. — A mucous orifice at the retral termi- 
nation of the cloak ; shield strengthened by soft calcareous 
matter. 
47. A. ater . — Tentacula and snout black ; body generally of 
the same colour. 
Limax ater, List. An. Ang. 131. Conch, t. 101. f. 102, and t. 101. a. f, 
103. Mull. Verm. Hist. ii. p. 2 — Arion ater, Ferussac, Hist. Moll. i. 
60. t. i. f. 1-3.— Common. 
Body rounded above, becoming ridged towards the tail. Shield granulated ; 
cloak with numerous anastomosing furrows, the margin with transverse pa- 
rallel ridges. Orifice of the pulmonary cavity near the anterior margin of 
the shield, with the sexual orifice underneath. Deposits its bluish eggs in a 
cluster in May at the roots of plants. Feeds on dead and living vegetables ; 
and even on the common earthworm when dead, according to Mr Power 
Linn. Trans, ix. 323 — This species is subject to considerable variation of colour, 
being sometimes of a brownish tinge (Limax rufus) ; or with the margin of 
the cloak reddish or yellowish. 
Gen. XIV. LIMAX. — No mucous orifice ; shield strengthened 
by a shelly plate ; the pulmonary cavity and sexual orifice 
under the right tentaculum. 
48. L. cmereus. — Grey, with dark brown spots ; tentacula 
veined. 
List. An. Ang. 127- Conch, t. 101. a. f. 104. Mull. Verm. Hist. ii. p. 3. 
Fer. Hist. Moll. i. 65. t. iv — Common. 
Length 5 or 6 inches. Three black lines between the tentacula. Shield 
nearly smooth ; the cloak with branched furrows. The foot whitish. Shell 
of the shield white, smooth, depressed, and translucent. Eggs white, depo- 
sited in spring, under stones. Food vegetables. Varies much in the colour- 
ing. Lives in old damp walls, and shaded places. 
49. L. agrestis. — Grey, clouded, tentacula black. 
L. cin. parvus. List. An. Ang. 130. Conch, t. 101. f. 101 — L. ag. Mull. 
Verm. Hist. ii. p. 8. Fer. Hist. Moll. i. 73. t. v. f. 7-10. — Common. 
Length about an inch, Tentacula short. Body convex above, ending in 
a ridge at the tail. Shell of the shield oval, pellucid. When touched its 
body becomes covered with a white mucus. Lurks under stones and rotten 
timber. — This species is capable of forming a thread, and suspending itself 
from trees, a kind of locomotion in the slugs, first noticed by Lister An. Ang. 
3., and afterwards by other observers, Linn. Trans, vol. i. 182, and vol. iv. 
p. 85. 
M. Ferussac adds as a synonime to his h.Jiavus., “ lutescens, fusco tessera- 
tus, tentaculis coeruleis ; clypeo postice rotundata,” i. p. 71 * t. v. f. 1-6, a re- 
ference to Pennant’s Brit. Zool. iv. 41, where, under the name Yellow Slug, 
a species is described “ of an amber colour, marked with white.” This is 
