HELIX. 



Plate XVI. 



Species 62. (Fig. a, b, c, JIus. Ciuning.) 



IIei.i.x ten era. Hel. testa imperforala, globoso-conica, 

 temii, l(ni, alba, fasciis nigricantibus et viridibus 

 ornatd, mibJiyalind ; spird depresso-conoided ; anfrac- 

 tiius qitatuor adquinqne, convexiusciilis ; columella mb- 

 rectd, lenul, nubexcavatd ; aperturd lunalo-rotundatd ; 

 periiloiiiate simplici, parum erpamo. 



Tfie delicate Helix. Shell imperforated, globosely 

 conical, thin, smooth, white, ornamented with blackish 

 and i;reen bands, snbhyaline ; spire dcpressly conoid; 

 whorls four to five, rather convex ; columella nearly 

 straight, thin, slightly excavated ; aperture lunar- 

 rounded; lip simple, but little expanded. 



SowERBY, Pro. Zool. Soc. 1840, p. 102. 



Hab. Islands of Tablas and Alindoro, Philippines; Cuming. 



The bands are exceedingly variable in this species, 

 being sometimes very broad, and irregidar, sometimes 

 almost wanting. 



Species 63. (Fig. a, b, Mus. Cuming.) 



Helix cakboxaria. Hel. testa imperforatd, subtrochi- 

 formi, leevi, purpureo-nigricante, epidermide fused, liy- 

 droplmnd, oblique slrigald, apice rubra vel violuced; 

 ■lulurd Uneari ; anfraclibm quinque, planiusculis, ul- 

 timo carinaio, basi plana ; basi subrectd, dilatatd, 

 fusciduld ; aperturd suhletragond, inlus lividd ; peri- 

 stomate simplici, vix incrassato. 



The coal-black Helix. Shell imperforated, somewhat 

 Trochus-shaped, smooth, pnrplc-black, oblicjuely- 

 streaked with a brown epidermis, apex reddish or 

 violet ; suture linear ; whorls five, rather flat, the 

 last keeled, flat at the base ; columella nearly 

 straight, dilated, brownish ; aperture subquadrangu- 

 lar, livid within ; lip simple, scarcely thickened. 



SowERBY, Pfeift'er, Pro. Zool. Soc. 18-12, p. 86. 



Hab. Island of Zebu, Fliilippines ; Cuming. 



The specimen represented at Fig. 63 a has an oblitpiely 

 streaked pattern upon the epidermis ; in that at Fig. 63 b 

 there is no pattern beyond what is derived from the ordinary 

 lines of growth. 



Species 64. (Fig. a, h, and Fig. 65, Mus. Cuming.) 



Helix collodes. Hel. testa imperforatd, subsetniglobo- 

 sd, tenni, intense castaned vel fusco-lutescente, nitidd. 



apice canted; sulurd distinctd, rufo-ntarginald ; ait- 

 fractibus quinque, contexiusculis, ultimo basi subplanu- 

 lato ; columelld brevi, obliqud, tenui ,- aperturd roluH- 

 dato-lunari, intusalbd; perisloma/e expanso, aubiucrat- 

 sato, nigricante. 



The gummed Helix. Shell imperforated, subsemiglo- 

 bose, very dark chestnut or yellowish, shining, apex 

 flesh-colour; suture distinct, edged with red ; whorls 

 five, rather convex, the last rather flattened at the 

 base ; columella short, oblique, thin ; aperture rotun- 

 dately lunar, white within : li]) expanded, slis;ht!y 

 thickened, blackish. 



SowERBY, Pro. Zool. Soc. 1840, p. 102. 



Hab. Island of Tablas, Philippines ; Cuming. 



In both the specimens here figured, differing so ma- 

 terially in colour, the form is identical, and each has a 

 natui'ally polished surface. 



For Fig. 65, see PI. XXI. 



Species 66. (Mus. Cuming.) 



Helix campanula. Hel. testd umbdicaid, globosd, so- 

 lidd, snitililer et reguhriler oblique striata, castaned ; 

 spird semiglobosd, apice obtusd, pallida ; anfrartibus 

 quatuor ad quinque, contexiusculis, ultimo anttcedenle 

 vix latiore, antici vix descendente, medio pallidi ciu- 

 gulato ; aperturd perobliqud, hinalo-otali, intits lires- 

 cenie, peristomate fusco, incrassato, brecUer rf/texo; 

 marginibus callo junctis, basali inlrorsum obsoMi al6o- 

 unidenlato, exlrorsum dilatato, umbiticum angusluiu 

 profundum semioccultante. 



The little bell Helix. Shell umbilicated, globc^e, 

 solid, finely and regularly obhquely striated, d.irk 

 chestnut ; spire scniiglobose, apex obtuse, pale ; 

 whorls four to five, rather convex, the last but little 

 broader than the preceding, scarcely descending in 

 front, encircled round the middle with a pale band ; 

 aperture very obli(|ue, lunar-oval, bluish within ; 

 lip brown, thickened, shortly reflected, margins 

 joined by a cjdiosity, inwardly obscurely wliitc-om- 

 toothed at the base, outwardly dilated, half cononlinj; 

 a narrow deep umbilicus. 



Pfeiffeb, Pro. Zool. Soc. 1S45, p. 65. 



IM. y 



The form of this species is chiefly remarkable for tin- 

 slightly apparent incrcasi' of the last whorl. 



Mav, 1351. 



