262 MOLLUSCA. PULMONIFERA. Helix. 



67. H. aculeata. — Whorls four, crossed by regular membra- 

 naceous ridges, which are produced into hair-like spines about 

 the middle. 



Mull. Hist. Verm. ii. 81 — H. spinulosa, Light. Phil. Trans, vol. 76. 166. 

 t. 11. lower f. 1, 5. Mont. Test. Brit. 426. t. xi. f. 10 — Among moss, 

 not uncommon. 



Breadth about the tenth of an inch; whorls brown, thin, rounded, well de- 

 fined, rather produced ; mouth rounded, the lips white, approaching ; pillar- 

 cavity distinct. 



~ 68. H. nitida. — Shell depressed, transparent, glossy, green- 

 ish, with a tinge of white on the pillar-cavity. 



List. Conch, t- 71- upper f. Mull. Hist. Verm. ii. 32 — H. lucida, Mont. 

 Test. Brit. 425. t. xxiii. f. 4. — Common among moss and under stones. 



*& 



Breadth nearly half an inch ; whorls five or six, the lower one rounded, 

 the upper ones nearly even, with a deep line of sepai'ation ; minutely striated 

 by the lines of growth ; mai'gin of the mouth thin ; pillar-cavity wide, ex- 

 posing two of the whorls. — The young shells of this species seem to be the 

 H. nitidula of Drap. Moll. 117, and described by the Rev. R. Sheppard, Linn. 

 Trans, xiv. 160. as occurring in Essex ; and the fry do not seem to differ 

 from the H. pygmea of Drop. Moll. 114, described by Dr Turton as found in 

 England abundantly in ditches, under leaves, — Zool. Journ. N°. viii. p. 565. 

 The Helix alliaria of Miller, Annals of Philosophy, t. xix. is probably also 

 only a variety of this species. He described it as " an umbilicated, depressed, 

 pellucid, shining, horn-coloured shell, having no more than four volutions. 

 This species never arrives to the size of II. nite)is, has one volution less, and 

 is found under moss on old trees. Its inhabitant smells strongly of garlick." 

 The Rev. Mr Sheppard takes notice of this fetid smell in the animal of 

 nitida, which, in some instances, he adds, " is not observable till the shell has 

 been immersed in boiling water." The H. nitida, hispida, and rvfescens, are 

 sometimes found under water. 



69- H. urtib'dicata.- — Whorls five, rounded ; apex slightly pro- 

 duced ; pillar-cavity large, exposing the whorls to the end. 



Mont. Test. Brit. 434. t. xiii. f. 2 H. rupestris, Drap. Moll, 82 — Un- 

 der stones and moss, in England and Scotland. 



Breadth about a tenth of an inch ; brown ; whorls finely and closely 

 striated across, deeply divided by the separating line ; mouth suborbicular, 

 margin thin ; upper tentacula short ; under ones mere tubercles. Before 

 reaching maturity, this species appears to be the II. Kirbii of the Rev. R. 

 Sheppard, Linn. Trans, xiv. 162, which differs merely in having four volu- 

 tions, and being half a line in breadth. 



70. H. crystcdlina. — Shell transparent, glossy, of four de- 

 pressed whorls, the last large. 



Mull. Verm. 23. — H. pellucida, Perm. Brit. Zool. iv. 138 — H. cryst. 

 Drap. Moll. 118. — At the roots of grass, England. 



Breadth about jjth of an inch ; whorls smooth,- with a deep line of separa- 

 tion, and the spire depressed ; aperture wide, the margin slightly thickened. 

 The specimens in my possession are from Battersea, and were sent to me by 

 Dr Leach 



71. H. caperata. — Whorls six, subcarinated, with interrupted 

 brown bands, and deep transverse stria?. 



