HELIX. 



Plate XCVII. 



Species 529. (Mus. Cuming.) 



Helix eximi.\. Ilel. testa umiilicatd, depresm-globoaa, 

 oblique rugosd et confertumime granulosa, olimceo-cor- 

 ned, fasciii fusco-viridibus ornatd; anfractibm quaiuor 

 ad quinque, convexiuscuUs, rapide accrescetitibun, uUbno 

 pennagno, circa aream umbilicalem compreaso-iiijlato ; 

 aperturd lunato-ovali, intits pallide lilacind; peristo- 

 maie simplici, angusle rejlexo, umbilicum aiiguslum 

 seniitegente. 



The choice Helix. Shell umbilieated, depressly glo- 

 bose, oblitiuoly wrinkled and very closely finely gra- 

 nulated, olive-liorny, ornamented with five brown- 

 green bands ; whorls four to five, rather convex, in- 

 creasing rapidly, the last very large, compressly in- 

 flated around the umbilical area ; aperture lunar-oval, 

 faintly tinged within with lilac ; lip simple, narrowly 

 reflected, half-covering the narrow umbilicus. 



Pfeiffer, Philippi, Abbild. und Jksch. vol. i. p. 133. 

 pi. 5. f. 6. 



Hab. Central America. 



A very characteristic species, encircled with conspicuous 



green bands upon a light olive-homy ground, while the 



lip is delicately tinged with lilac. 



Species 530. (Mus. Cuming.) 



Helix caduca. Hel. testd svblate umbilicatd, depressd, 

 fragili, leviter slriaiuld, aliidd, epidermide fuho-corited 

 induld ; spird pnrum elevatd, verlice suilili ; aiifracti- 

 bus quinque ad sex, convexiusculis, ultimo multo latiore, 

 bad subplanulato, circa umbilicum angudum externe 

 subivfundibulifortnem excatato ; aperturd majusculd, 

 oblique Irmicalo-uvali ; peristomate simplici, tenui, 

 marginibus subconnivetitibus, columellari vix expansi- 

 usculo. 



The brittle Helix. Shell rather broadly umbilieated, 

 depressed, fragile, finely striated, whitish, covered 

 with a fulvous-homy epidermis ; spire but little 

 raised, fine to the apex ; whorls five to six, rather 

 convex, the last much broader and rather flat at the 

 base, excavated round the umbilicus, which is narrow, 

 and externally funnel-shaped ; aperture rather large, 

 obliquely truncatcly oval; lip simple, thin, with the 

 margins approximating, columellar margin but little 

 expanded. 



Pfeiffer, Zeitschrift fur Malac. IS+G. p. 158. 



A thin shell, but of solid substance, chiefly distinguished 

 from its congeners by the compressly flattened convexity 

 of the base arouud the edge of the umbilicus. 



Species 531. (Mus. Cuming.) 



Helix cincinn'CS. Ifel. testa late el umplHer umbilicatd, 

 orbiculato-depressd, tenui, confertiaime ruguloso-atria/d, 

 bast lieciore, nilcnte, vivide olitaced, spird saturatiore ; 

 anfractibus quatuor ad quinque, lente accrescentibni, 

 supenii subplanulatis, it{fra rotundatii, ultimo ant ice 

 de/lexo; aperturd horizonlali-lunari, inlut ctemUiceitte- 

 lacted ; peristomate simplici, marginiiut ntbcoitniren- 

 libus, columellari leviter refiexo. 



The curl Helix. Shell broadly and largely umbilieated, 

 orbicularly depressed, thin, very closely rugulosely 

 striated, smoother and shining at the base, bright 

 olive, darker about the spire ; whorls four to five, 

 increasing slowly, rather flattened above, rounded 

 beneath, last whorl deflected in front ; aperture hori- 

 zontally lunar, blue-white within ; lip simple, mannns 

 approximating, columellar margin slightly reflected. 



Eab. Maule, Chili (under decayed leaves) ; Cuming. 



This is Dr. PfeitTer's 77. laxata, variety y, which he 

 quotes as being probably the II. umbilicata of Anton, a 

 name pre-occupied by Montagu in reference to another 

 species; it is endently distinct. Mr. Cuming found it in 

 great abundance at the above-named locality, witliin fifty 

 miles of H. laxata, but not «-ith it. The form of the 

 shell is rounder, and the last whorl is less enlarged to- 

 wards the aperture. No sj)ecimen3 of int<^micdiate form 

 were collected, and it was mostly of adult growth. 



Species 532. (Mus. Cuming.) 



Helix laxata. Hel. testa late et perampUler umbilicatd, 

 orbiculato-depressd, aperturam wrtiu oblique productd, 

 tenui, con/erti-isiiiie ruguloso-striatd, supenii fulro-ru- 



fescente, basi nitide fuko-olitaced, liueis concmtrici* 

 conferliasimis minute decussatd ; spird rii elfNitd ; 

 anfractibus quatuor ad quinque, ronrrxiutcutit, rapidi 

 accrescentibus, ultimo lato, depresso, aiilici detcmdmU ; 

 aperturd subhorizoutali, ampld, traturrrte arali, iulu* 

 ccerulescente-albd ; peristomate subsimplici, uujrgiuibus 



fere junctis, superv tenui, expauto, bamli lubcalloto, 

 refiexo. 



Mnv, 1852. 



