BoLiMus. MOLLUSC A. PULMONIFERA. 265 



4. H. striata. — Conical, depressed, subcarinated, obliquely striated, a 

 rising band around the edge, crossed by arched striae ; columella solid, aper- 

 ture subtriangular. — Soiver. Min. Conch, t. clxxi. f. 1. — Carboniferous LimC' 

 stone, Derbyshire. 



5. H. cirriformis. — Conical, acute, umbilicate, decussato-striated ; with a 

 band around the middle of the whorl, crossed with arched striae ; aperture 



nearly round Sower. Min. Conch, t. clxxi. £ 2 — In Carboniferous Limestone, 



Derbyshire. 



6. H. IcBvis, — Whorls three ; surface smooth ; spire elevated. —Mantell, 

 Geol. Suss. 263. t. xviii. f. 19, 20.— In Plastic Clay, Bath. 



7. H. pusilla Depressed, smooth, umbUicated, convex beneath. Volu- 

 tions round and tapering ; their number about three. Mouth rouncUsh 



Mart. Pet. Derb. t. lii. f. 3 In a fossil pericarp, in Clay Ironstone, Derby- 

 shire. 



Gen. XIX. BULIMUS.— Aperture of the shell longer than 

 broad, the margin near the pillar entire. 



80. B. acutus. — Whorls nine, rounded, white, with trans- 

 verse interrupted brown stripes. 



Buccinum exiguum fasciatura et radiatum, List. Conch, t. xix. f. 14, — 

 Helix acuta. Mull. Verm. ii. 100. — Turbo fasciatus, Penn. Brit. Zool. 



iv. 131. Mont. Test. Brit. 346 — Bui. acutus, Drap. Moll. 77 On 



dry banks near the sea. 

 Length fths of an inch ; whorls strongly wi'inkled across, sometimes a 

 single or double longitudinal brown band on the lower side of the body-whorl. 

 Margin of the mouth a little reflected on the small pillar-cavity. — Animal 

 pale yellow. 



81. B. ohscurus. — Shell brown, oblong, subcylindrical in the 

 middle, with a blunt spire ; outer-lip of the mouth nearly 

 straight. 



Buccinum rupium majusculum circiter senis orbibus circumvolutum, 



List. An. Ang. 122 — Helix obscura, Mull. Verm. ii. 103 Turbo sex 



anfractibus striatis apertura subrotunda marginata, Walk. Test. Min. 

 Rar. t. ii.,f. 41. Mont. Test. Brit. 391.— B. nbs. Drap. Moll. 74.— Moist 

 woods and rocks. 



Length fths of an inch ; breadth about one-third of its length : whorls 

 from five to seven, with faint lines of growth, slightly rounded, ending in a 

 blunt knob ; pillar-lip nearly perpendicular, a little reflected on the pillar- 

 cavity ; peristome white. 



82. B. LacJchamerisis. — Shell brown, oblong, subcylindrical 



in the middle, with a blunt spire ; outer-hp rounded. 



Helix Lack. Mont. Test. Brit. 394.— Bui. montanus, Drap. Moll. 74.— 

 In woods, England. 



Length |ths of an inch ; breadth one-fourth of the length. Similar in 

 other respects to the B. obscurus except size, the lines of growth stronger, and 

 the outer edge of the mouth a little more rounded. Judging from an au- 

 thentic specimen sent to me by the late Mr Montagu, it seems to be only a 

 large variety of the preceding species. 



83. B. luhrkus. — Shell glossy, horn-coloured, bluntly taper- 

 ing; mouth, externally, narrow. 



