190 W6&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 • 

 whorl* placed rather laterally : pillar lip thick, white, grooved : 

 perforation small, deep. 



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

 convex whorls surrounded with sharp membrana- 

 ceous rings and carina te with small spines on the 

 back. 



Montague t. n./. 10. Phil. Trans. 76. r. e./. ■>£■ 



Shell the tenth of an inch wide, covered with a rugged and spi- 

 nous skin : aperture suborbicular. 



522. H. Pomatia. Dirty-white, with mostly S reddish- 

 brown bands on the larger whorl, subovate, obtuse, 

 longitudinally striate : aperture round-lunate. 



Br. Zee/, t. 84./. 128. Donov. f. 84. Da Costa t. 4./, 14. 



Shell 2 inches wide, fubglobular, with 3 or more bands round 

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

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

 ted : per/oration small. 



523. H. Arbustorum, Mottled grey brown yellowish and 

 chesnut, convex, pointed : aperture suborbieular, 

 with a reflected margin, elongated on the fore- 

 part. 



Br< Zoeh t. 85./. 130. Donov. t. 136. Da Costa t. 17./. 6. 



Shell hardly 3 quarters of an inch wide, slightly umbilicate, pale 

 or yellow-chefnut marbled with oblong brown spots, and generally < 

 with a single fpiral brown band, within chefnut with a broad pure 

 white border. 



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

 oval aperture, and the whorls of the tip reversed. 



Walker Minute Shells/. 24. Minute. 



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

 smooth whorls, and roundish aperture. 



Walker minute Shell's/. 25. 



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

 bilicate, with a single whorl, and rounded margined 

 aperture. 



Walker minute Shells /. 26, Adams Microsc. t. 14./. »2.- 



527. H. unispiralis. White, opake, smooth, umbilicate 

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

 ture. 



Walker minute Shell, tab. i.f. 27. 



528. H. striata. Greenish-white, pellucid, striate, with 

 .3 whorls reflected on the back : aperture suboval. 



Walker minute Shells/. 20. Adams Microsc. t. 14./, 13. 



529. H. coarctata f White, pellucid, with 2 whorls: 

 aperture roundish, contracted near the umbilicus. 



Walker Minute Shells/. 30, 



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

 and a margined protruded tube at the base. 



Adams Linn. Trans, in. p. 67, 1. 13./. 35. 36. 



