History of British animals - University of Guam Marine Laboratory

.Buccinum260 MOLLUSCA. PULMONIFERA. Helix-58. H. albella.— Shell flat above, with a carinated edge ; gibbousbeneath.Cochlea alba, List. Conch, t. 80. f. 81—H. alb. Linn. Syst. 1242. DrapMoll. 113 On the shore, St Andrew's.Shell dusky yellowish-white, minutely striated by the lines of growth.Whorls 3 or 4, the line of separation distinct, but the spire very little raised.Mouth rather wide at the pillar. Draparnaud states, after Muller, that threespires can be seen in the pillar cavity a ; mistake, probably arising from thelatter contemplating a dead specimen of Planorbis corneus, instead of the truealbella.By the former, that animal is said to frequent rushes on the coast.A single dead specimen of this shell, in my possession, was found in 1810, onthe shore at St Andrew's.59- H. terrestris.— Spire conical, whorls flat, carinated atthe base.Trochilus Monspessulanus, List. Conch, t. Gl. f. 58—Trochus terrestris,Penn. Brit. Zool. iv. 127. Don. Brit. Shells, t. iii. Mont. Test. Brit.287—H. elegans, Drap. Moll. 70— England, rare.Shell whitish, striated longitudinally; whorls 5 or G, nearly flat, dividedby a very small depressed line, with a prominent ridge at the base»of each ;apex produced, but not very pointed ; mouth compressed, angulated ; baseflat, striated from the centre This species has hitherto been found only inNorthamptonshire by Morton, and Cumberland by Hudson.60. H. Trochilus.— Spire conical ;whorls rounded.parvum sine Trochilus sylvaticus, List. An. Ang. 123—H.Troch, Mull. Verm. ii. 70.—H- trochiformis, Mont. Test. Brit. 427.—In moist situations, rare.Shell thin, pellucid, horn coloured ; whorls 6, rounded, and strongly dividedby the separating line ; 'apex considerably produced ; mouth transverse,narrow ; lip a little reflected on the pillar cavity. Montagu has found thisspecies in Wiltshire and Devonshire among decayed wood. A specimen,found in the south of Fife, was presented to me by Mr Chalmers, surgeon,Kirkcaldy.61. H. Turtoni.— Shell flat on both sides, with a roundedmargin.H. rotundata, Turton, Conch. Diet. 53." Shell quite flat and level on both sides, dark horn coloured, with transversechesnut marks or blotches, which, however, are not in a regular radiatemanner, with the perforation rather large, but not exhibiting the internalvolutions ; spires 6, rounded and well defined, crossed with regular, closeset, fine, rather oblique, raised lines ; the largervolution rounded at the marginand without the faint keel-like appearance; aperture large, roundish,crescent shaped, the margin thin and not reflected over the perforation diameternot a quarter of an inch." Such is the description of a singular spe-;cies found by Dr Turton in the woods near Brecon. It is not the H. rotundataof Muller, though probably a variety of his H. obvoluta, Hist. Venn,ii. 27-** Preceding whorls in part exposed by the pillar cavity.62. H. ericetorion.— Whorls six, rounded, subdepressed;mouth suborbicular ; pillar cavity very wide.