74 IIELIClDiE. 



peculiar to Britain, tliougli now, however, proved to be a 

 German species also. It lives among moss in woods, and 

 is most abundant in the north of England. It is widely 

 distributed in Ireland. 



H. AcuLEATA, Muller. 



Minute, with oblique longitudinal membranaceous lamella?, that 

 project in a series of prickles around the lower volutions : mouth 

 about as high as it is wide. 



Plate CXVII. tig. 5, 6. 



Helix ac>ileafa,'M.ULL'E,R,H\st. Verm. pt. 2, p. 81. — Fleming, Brit. Animals, 



p. 262. — Jeffreys, Trans. Linn. Soc. vol. xvi. p. 332, 507. — 



Grav, Manual L. and F. W. Shells, p. 149, pi. 4, f. 33.— 



Thompson, Ann. Nat. Hist. vol. vi. p. 25. — Macgilliv. Moll. 



Aberd. p. 80.— Brown, Illust. Conch. G. B, p. 47, pi. 17, f. 1 . 



— Drap. Moll. Ter. et Fluv. France, p. 82, pi 7, f. 10, 11.— 



C. Pfeif. Deutsch. Land und Siissvv. Moll. pt. 3, p. 24, pi. 4, 



f. 24, 25. — Lam. (ed. Desh.) vol. viii. p. 79. — Rossmassl. 



Iconog. Land und Sussaw. Moll. pt. 8, p. 38, f. 536.— Dupuy, 



Moll, du Gers, p. 1 5. — Morelet, IMoll. Ter. et. Fluv. Portugal, 



p. 72.— Chemn. (ed. KUst.) Helix, no. 178, pi. 33, f. 11, 12. 



— Pfeif. Monog. Ilelic. vol. i. p. 50. 



„ sjiitmlosa, Lightfoot, Pbilosoph. Trans. 1786, p. 106, pi. 2, lower com- 



partm.— Mont. Test. Brit. p. 429, pi. 11, f. 10.— Maton 



and Rack. Trans. Linn. Soc. vol. viii. p. 201. — Dorset Catalog. 



p. 54, pi. 19, f. 23.— Turt. Conch. Diction, p. 55; Manual L. 



and F. W. Shells, p. 43, f. 33.— Index Testaceolog.pl. 33, f. 69. 



Trochus terresti-is, var. Da Costa, Brit. Conch, p. 36, probably. 



Teha spinitlosa. Leach, MSS. (cited by Turton, &c.) 



„ Grunatelli, BivoN. (filius) in Occhio 1 839, no. 9, f. 2. 

 Tiiticola aculeata, Held, Tsis, 1837, p. 914. 



Shell minute, globose-turbinate, thin, semitransparent, 

 not lustrous, of an uniform yellow or brownish horn- 

 colour, covered with an epidermis, which rises upon the 

 lower whorls in regular obliquely longitudinal riblike la- 

 minpe, which shoot out above into somewhat lanceolate or 

 spinous foliations, cresting, as it were, the upper portion 

 of the middle of the whorls with a spiral row of membrana- 



