190 WQ&MS:.TESTACEA. 59. Helix. 



520. H. Lacuna. Pale horn-colour, subglobular, with 

 4 tumid smooth whorls : pillar grooved with a long 

 canal. 



Montague Brit. Shells, p. 428. tab. 13. /. 6. 



Shell a quarter of an inch wide, about as much high ; the 2 upper - 

 \vhorls placed rather laterally ; pillar lip thick, white, grooved 

 perforation small, deep. 



521. 11. spinulosa. Brown-horny, subconic, with 5 

 convex whorls surrounded with sharp membrana- 

 ceous rings and cariiiatc with small spines on the 

 back. 



Montague t. n.f. 10. Phi!. Trans. 76. t. 2./. 1-5. 



S/ieti the tenth of an inch wide, covered with a:i tigged 'and spt- 

 nous skin : aperture suborbicular., 



522. II. Pomatia. Dirty-white, with mostly 3 rcddish- 

 bro\vn bands on the larger whorl, subovate, obtuse, 

 languid inally striate : aperture round-lunate. 



Br. ZooL t. 84. /. 128. Donov. t. 84. Da Cosla t. 4 ./. 14. 



She!! 2 inches \vide, lubglobular, with- 3 or more bands round 

 the larger whorl, one of which continues round the reft : aperture 

 large, the margin a little thickened aud reflected; pillar-lip reflec- 

 ted : perforation small. 



523. 11. Arbustorum. Mottled grey brown yellowish and 

 chcsnut, convex, pointed : aperture suborbieular, 

 with a reflected margin, elongated on the fore- 

 part. 



Br. ZooL t, 85. /. 130. Donov. t. 136. Da Costa t. 17/. 6. 



5Arf/h4rdl? 3 quarters of an inch wide, slightly umbilicate, pale 

 or yellow-chelnut marbled with oblong brown spots, and generally 

 with a single fpiral brown ba:n!, within chefnut with a b/oad pure 

 white, border. 



524. II. resupinata. Horn-colour, glossy, with a large 

 oval aperture, and the whorls ol 1 the tip reversed. 



Walker Minute S/uitsf. 24. Minute. 



525. 11. globosa. White, opake, glossy, round, with 2 

 smooth whorls, and roundish aperture. 



Walker minute Shells- /. 25. 



526. H. rtticulata. White, pellucid, reticulate, subum- 

 bilicate, with a single whorl,, and rounded margined 

 aperture, 



Walker minute Shf!hf. 26; Adams Microsc. t. i^.f. 12. 



527. H. wiispiralis. White, o|>ake, smooth, umbilicnte 

 both sides, with a single spire,, and rounded aper- 

 ture. 



Walhei minute Shell, tab. \.f. 27. 



528.. 11. slduta. Greenish-Mbite, pellucid,, striate, with 

 3 whorls -reflected on the back- : aperture subo\al. 



W.a\her minute Shells f. 2q. Adams Microsc. t. 14. /. 13. 



529. H. cuarctata. White, pellucid, with 2 whorls: 

 aperture roundish, contracted near the umbilicus. 



Walker Minute Skills f. 30. 



530. H.tubulata. With 3 longitudinally striate whorls, 

 and a margined protruded tube at the base. 



Adams Linn. Tram, iii.j>.6;. f. 13. f. 35. 36. 



