HELIX. 



Plate XX. 



Species 82. (Mus. Cuming.) 



Helix retusa. Hel. testa imperforatd, suhgloboad, apice 

 return, tenui, lavigatd, bad conceidrice siriolatd, cas- 

 laneo-fidvd, epidermide hydrophand, albidd, decidud, 

 partim striffald et Jlammulatd, survini pallescente, can- 

 taneo-fasciatd ; spird brevi ; anfractibus qualuor, con- 

 vexiuscitlis, ultimo subaiu/ulato, vix descendente ; colu- 

 mella intrante, albd ; aperturd rolundato-lunari, intus 

 iridescente; perMomate late expaiuo, reflexo. 



The blunt Helix. Shell imperforated, subglobose, 

 blunt at the apex, thin, smooth, concentrically finely 

 striated round the base, fulvous cliestnut, broadly 

 streaked and flamed nith wliite hydrophanous epider- 

 mis, partially deciduous, pale above, faintly chestnut- 

 banded ; spire short ; whorls four, rather convex, last 

 whorl slightly angled, but little descending ; colu- 

 mella entering, white ; aperture rotundately lunar, 

 iridescent within ; lip broadly expanded, reflected. 



Pfeiffer, Pro. Zool. Soc. 18i5, p. 132. 



Hab. Island of Samar, Philippines ; Cuming. 



This shell is quite transparent except where the whorls 

 are streaked by opake-white hydrophanous epidermis. It 

 is of a peculiar blunt globose form. 



Species 83. (Fig. a to/, Mus. Cuming.) 



Helix ixtorta. Hel. ttsld imperforatd, depreuo-globotd, 

 tenui, diaphand, suhidiinime striata, coloribus taldi ra- 

 ria/ite ; suturd lineari, opaco-albd, plerumque rufo-mar- 

 ginatd ; anfraclibua quatuor ad qtiinque, vix conrexiuA- 

 culis, supremis depreuis, ultimo aubtui inflato ; colu- 

 melld oblique descendente, acuta, subexcavatd ; aperturd 

 lunato-rolundotd ; perislomate simplici, refexiuKulo. 



The cdrled Helix. Shell imperforated, dcpressly glo- 

 bose, thin, diaphanous, very finely striated, varjing 

 considerably in colour ; suture opakc white, gene- 

 rally edged with red ; whorls four to tive, slightly 

 convex, the uppcnnost depressed, last whorl iaBated 

 below ; columella obliquely descending, sharp, slightly 

 excavated ; aperture lunar-rotimdate ; lip simple, a 

 little reflected. 



SowERBY, Pro. Zool. Soc. 1840, p. 16S. 



Hab. Islands of Bohol, Capul, Negros, and Siquijor, 

 Philippines; Cuming. 



The form of this species is always the same, but the 

 colouring is extremely variable, consisting of delicately 

 tinted brown, or green, or yellowish-obvc. One charac- 

 teristic feature of the species is that the sutural line of the 

 spire is always finely picked out with opake wliitc. 



Mav, 1851. 



