History of British animals - University of Guam Marine Laboratory

262 MOLLUSCA. PULMONIFERA. Helix.67. H. aculeata.— Whorls four, crossed by regular membranaceousridges, which are produced into hair-like spines aboutthe 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 defined,rather produced ; mouth rounded, the lips white, approaching ; pillarcavitydistinct.~68. H. nitida.— Shell depressed, transparent, glossy, greenish,with a tingeof white on the pillar-cavity.List. Conch, t- 71- upper f. Mull. Hist. Verm. 32—H. ii. 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 striatedby the lines of growth ; mai'gin of the mouth thin ; pillar-cavity wide, exposing— two of the whorls. The young shells of this species seem to be theH. 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 differfrom the H. pygmea of Drop. Moll. 114, described by Dr Turton as found inEngland abundantly in ditches, under leaves, — Zool. Journ. N°. viii. p. 565.The Helix alliaria of Miller, Annals of Philosophy,t. xix. is probably alsoonly 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, andis 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 ofnitida, which, in some instances, he " adds, is not observable till the shell hasbeen immersed in boiling water." The H. nitida, hispida, and rvfescens, aresometimes found under water.69- H. urtib'dicata.-— Whorls five, rounded ;apex slightly produced;pillar-cavity large, exposing the whorls to the end.Mont. Test. Brit. 434. t. xiii. f. 2 H. rupestris, Drap. Moll, 82—Understones and moss, in England and Scotland.Breadth about a tenth of an inch ; brown ;whorls finely and closelystriated across, deeply divided by the separating line ;mouth suborbicular,margin thin ; upper tentacula short ; under ones mere tubercles. Beforereaching maturity, this species appears to be the II. Kirbii of the Rev. R.Sheppard, Linn. Trans, xiv. 162, which differs merely in having four volutions,and being half a line in breadth.70. H. crystcdlina.— Shell transparent, glossy, of four depressedwhorls, 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 separation,and the spire depressed;aperture wide, the margin slightly thickened.The specimens in my possession are from Battersea, and were sent to me byDr Leach71. H. caperata.— Whorls six, subcarinated, with interruptedbrown bands, and deep transverse stria?.