Mollusca of Great Britain. 341 
Helix nitens. Maton & Rackett in Linn. Trans.8. p.198. 
652435 
-—-— cellaria. Lam. Hist. des Anim. sans Vert. 6. p. 91. 
Common ; found with the last. 
23. ALLIACEA. 
24. 
Animal nigrescens. Tentacula brevia, cylindrica. 
Testa supra plana, politissima, diaphana, rufescenti-cornea ; 
subtüs lactea. Anfractus 4—5, suturé marginata. Aper- 
tura obliqua, subrotundo-lunata. Umbilicus suban- 
gustatus, sinu profundo. 
Long. 0.1.—Diam. 0.225. 
Helix alliaria. Miller in Ann. of Philos. 1822, p. 379. 
Under stones &c. in moist situations ; often in company 
with the H. nitida, but by no means so common. The ani- - 
mal has a strong odour of garlic, which is very perceptible 
on its being plunged into boiling water. It is a very distinct 
species, and differs from the young of the last in the greater 
depression of its spire, and greater transparency and con- 
traction of the umbilicus. First described by Mr. J. S. Mil- 
ler in the Annals of Philosophy for 1822. 
CRYSTALLINA. 
Animal lacteum. | Tentacula superiora obtuse cylindrica. 
Testa suprà plana, vitrea, hyalina, politissima. Anfractus 5, 
parüm decrescentes, subtàs convexiusculi, suturá sub- 
marginata. Apertura lunata. Umbilicus peus 
foramine cylindrico. 
Long. 0.075.— Diam. 0.125. 
Helix crystallina. Müll. Verm. 2. p. 293. Drap. Hist. 
des Moll. p.118. t. 8. f.13—17. Non Dillw. Cat. 2. 
p. 909. 
Under 
