HELIX.— Plate CLXXIII. 



Ilab. Camps Bay, Cape of Good Hope (under stones) ; 

 Benson. 

 DistingiiishiKl by a delicate cancellated sculpture in the 

 interstices between tlic rib-like striie. 



Species 1172. (Mus. Benson.) 



Helix dujieticola. Uel. lesld umbilica(d,depressd,tenui, 

 supeme cotlulato-striatd, siibtm Ueviore, comeo-albidd, 

 epidennide luted, quasi Inbricd, itidutd ; apird convexi- 

 tisculd, apice obtusd ; mturd impremd ; anfraclibus tri- 

 bus ad qualuor, convexiusculii, ultimo rapide aecres- 

 centtbtis, subdepresso, basi convexo; umbilico latiusculo, 

 profunda ; aperturd magna, parum obliqud, lunato- 

 ovali; perislomaie dmplici, tenui, acuta, marffinibm 

 subapproximatis, calumellari superne dilatato, patente. 



The coppice Helix. Shell umbilicated, depressed, thin, 

 rib-like striated at the upper part, smoother beneath, 

 horny-white, covered with a yellowish smooth epider- 

 mis ; spire rather convex, obtuse at the apex ; suture 

 impressed ; whorls three to four, rather convex, the 

 last increasing rapidly, a little depressed, convex at 

 the base ; umbilicus rather broad and deep ; aperture 

 large, but little oblique, lunar-oval ; lip simple, thin, 

 acute, margins rather approximating, columellar mar- 

 gin dilated at the upper part, patent. \ 



Benson, Ann. and Mag. Nat. Hist. 1851, vol. vii. p. 106. 



Ilab. Cape of Good Hope (among thickets on the shores 

 of False and Table Bays) ; Benson. 



Partaking rather of the form of Cyclostoma. 



Species 1173. (Mus. Benson.) 



Helix perplicata. Hel. testa anguste wnbilicatd, conoi- 

 deo-semiglobosd, tenui, corned, subdiaphand, n/rinque 

 oblique plicald, plicis subdistanlibus, inlerstiliis longi- 

 iudinaliler striatis ; spird elevatiusculd, subconoided, 

 apice Ifpvi, acutiusculo, lutescente ; suturd impressd ; 

 anfraclibus quinque ad sex, couvexiusculis, lenle accres- 

 centibus, ultima leviler depressa, nan descendente, sub- 

 tus convexiore ; aperturd ratundato-lunatd, vix ob- 

 liqud; peristomate simplici, acuta, margine calumel- 

 lari tenui, superne breviter reflcxo. 



The many-plaited Helix. Shell narrowly umbilicated, 

 conoidly-scmiglobose, thin, horny, subdiaphanous, 

 obliquely plicated on both sides, ])laits rather dis- 

 tant, striated longitudinally in the interstices; spire 

 rather raised, subeonoid, apex smooth, rather sharp, 

 yellowish ; suture impressed ; whorls five to six, 

 rather convex, increasing slowly, the last slightly 

 depressed, not descending, more convex beneath ; 

 aperture rotundately lunar, a little oblique ; lip sim- 

 ple, acute, columellar margin thin, shortly rellceted 

 at the upper part. 



Benson, Ann. and Mag. Nat. Hist. 1851, vol. vii. p. 104. 

 Ilab. Cape of Good Hope (in stumps and putrid fungi 

 under the Devil's Mountain) ; Benson. 



Of the same typical character as II. petrobia, but more 

 acuminated in the spire. 



Species W'ti. (Mus. Benson.) 



Helix cosmia. Ilel. tesld aperte profundi umbilieatd, 

 depressd, tenui, rugoso-pUcatuM, translucenle, nilidiut- 

 culd, cered, tirenli-corned ; spird vix eleratd, apice 

 obtusd; anfraclibus qualuor, subplanatis, rapide accret- 

 centibus, ultimo antici dilatato, noti descendente ; aper- 

 turd obliqud, lunalo-rolundafd; perislomaie tenui, 

 margine dextro superne arcuato, columellari breviter 

 reflexiusculo. 



The adorned Helix. Shell openly deeply umbilicated, 

 depressed, thin, nigosely plicated, transparent, rather 

 shining, wax -like, greenish- horny ; spire scarcely 

 raised, obtuse at the apex ; whorls four, rather flat- 

 tened, increasing rapidly, the last dilated in front, 

 not descendiug ; aperture oblique, lunar-rounded ; 

 lip thin, right margin arched at the upper part, 

 columellar margin slightly reflected. 



Pfeiffer, Zeitschrift fur Malac. 1S52, p. 112. 

 Helix mutida, Benson (not of Adams). 

 Helix cerea, PfeifFer (not of Gould). 



Ilab. Cape of Good Hope (at the foot of Lion's Head, 

 Camj)s Bay, among fallen leaves) ; Benson. 



A light transparent waxen horny shell, openly flatly 

 convoluted. 



Species 1175. (Mus. Bcuson.) 



Helix suffclta. Hel. testa vix umbilieatd, depresso- 

 canicd, subtus medio subexcavatd, stramineo-corned, sub 

 lente subtilissime oblique dense striatd ; spird concexd ; 

 suturd impressd ; anfraclibus sex, subrotundatis ; aper- 

 turd lunari ; peristomate tenui, paululum re/lexo, ad 

 calumellam contorto, dente prominente caHond-albo intus 

 muni to. 



TuE undek-propped Helix. Shell scarcely umbilicated, 

 depressly conical, slightly excavated in the middle 

 underneath, straw-horny, beneath the lens very finely 

 densely obliquely striated ; spire convex ; suture im- 

 pressed ; whorls six, rather rounded ; aperture lunar; 

 lip thin, a little reflected, twisted at the columella, 

 and furnished inwardly with a prominent white cal- 

 lous tooth. 



Benson, Ann. and Mag. Nat. Hist. vol. xi. p. 31. 



Ilab. Mauritius ; Sir David Barclay. 



Distinguished by the same typical characteristic twisted 

 columellar tooth as //. albidens from the same locality. 



