HELIX.— Plate XCVII. 



The loosely convoluted Helix. Shell broadly and 

 very largely unibilicatud, orbicularly depressed, ob- 

 liquely produced towards the aperture, tiiiii, very 

 closely rugosely striated, fulvous-red about the upper 

 part, fulvous-olive and shiuiug at the base, minutely 

 decussated with very close-set concentric lines ; spire 

 but little raised ; whorls four to live, rather convex, 

 increasing rapidly, last whorl broad, depressed, de- 

 scending in front ; aperture soiniwhat horizontal, 

 large, transversely oval, blue-white within ; lip rather 

 simple, margins almost joined, upper margin thin, 

 e.xpanded, basal margin rather callous and reflected. 



Ferlssac, Hist. Moll. pi. 7i. f. 3. 

 Helix Penwiana, Laraarck. 

 Helix De.ihai/esii, Anton. 



Hal). Chili ; Cuming. 



This fine and well-known species does not inhabit Peru, 

 as indicated by the name given to it by Lamarck. It has 

 been for a long time known to collectors by the unpub- 

 lished name of H. Battksii. 



tails to the Chilian type //. laxiita. It differs little from 

 that species, except in being of n rounder form. 



Species 533. (Mus. Cuming.) 



Helix eukyomphala. Hel. testa lalU mnbilicatd, orhicu- 

 lalo-convexd, tenia, pellucidu, virente-corned, siiperne 

 regulariter costiilato-slriatd, lineii concentricis obsolete 

 (lecussatd, basi distmitius stmitd, nitidissimd ; spird 

 parum elevald, obliisd; anfractibus sex, convexiitsculis, 

 itllimo dilatalo, subdepresso, antice non descendente ; 

 iimbilico mayiio, pervio ; aperturd oblique lunato- 

 ovali ; peristomate recto, simplici, muryinibm conni- 

 veiiti/jHS. 



The broadly cmbilicated Helix. Shell broadly >im- 

 bilicatcd, orbicularly convex, thin, pellucid, greenish- 

 horny, regularly finely ribbed about the u])per part, 

 obsolctcly decussated with concentric lines, more 

 distantly striated and shining at the base ; spire but 

 little raised, obtuse; whorls six, rather convex, the 

 last dilated, somewhat depressed, not ilcseending in 

 front ; umbilicus large, open ; aperture obliijuely 

 binar-oval ; lip straight, simple, margins approxi- 

 mating. 



Pfeiffer, Pro. Zool. See. 1845. p. 71. 

 Had. Cuba? 



If the above locality, quoted on the authority of Dr. 

 I'feifl'tr, be con-ect, it is somewhat curious to find in tiic 

 North .\ntilles a shell belonging so minutely in all its de- 



Species 534. (Mus. Cuming.) 



Helix Flora. Hel. testa sublati umbilicatd, tenni, dura, 

 pellucido-aUid, epidermide virescenle-olivaced corned 

 imliild, vix striatu, uileiite ; spird plano-depresw ; an- 

 fraclibits qiiatuor ad qiiiiique, superne planatit, infra 

 rotundatis ; aperturd lunato-circulari ; peristoma/ e 

 tenui, marginibus connitentibus. 



The Flora Helix. Shell rather broadly umbilicated, 

 thin, hard, transparent white, covered with a greenish- 

 olive horny epidermis, but little striated, shining ; 

 spire flatly depressed ; whorls four to five, flat at the 

 upper part, rounded beneath ; aperture lunar-circu- 

 lar ; lip thin, margins a])i)roximating. 



Pfeiffer, MSS. (Mus. Cuming.) 



Hab. jVndes of Coliunbia. 



This species differs from its congeners collected in this 

 Plate, in not having the close-set rib-like stria;, with which 

 the upper portion of the whorls is sculptured. Here it is 

 smooth and horny. 



Species 535. (Mus. Cuming.) 



Helix Ghiesbreghti. Hel. testa miampl iter umbilicatd, 

 orbiciilato-i/lobosd, striata et subtilisswi} granulatd, 

 epidermide brevipilosd indutd, briinned, coiiis iiiffricaii- 

 tibus et luteis oritatd ; anfractibus quiaque ad sex, c<m- 

 vexiusculis, idtimo magna, rotundato, circa umbilicwn 

 subcompresso ; aperturd lunato-rotuudatd ; peristomate 

 expanse, alba, breviter re/lexo, marginibus coniiicentibus, 

 columellari dilatato. 



Ghiesbregiit's Helix. Shell rather largely umbili- 

 cated, orbicularly globose, striated and very finely 

 granulated, covered with a short hairy epidermis, 

 brown, ornamented with blackish and yellowish 

 zones ; whorls five to six, rather convex, the last 

 large, rounded, slightly compressed around the um- 

 bilicus ; aperture lunar-rounded ; lip expanded, white, 

 shortly reflected, margins approximating, columellar 

 margin dilated. 



Nyst, Bull. Nat. Hist. Soc. Bnissels, 1841. vol. viii. 

 p. 343. f. 2. 



Hab. Chiapa, Mexico ; Nyst. 



The epidermis of this fine species is covered with nume- 

 rous short silken golden hairs. 



