HELIX— Plate XLII. 



The horny coating of this species is of a yellowish-olive 

 colour l)eneath, and dull brown above. The columella is 

 distiiwniishcd by a callous tooth-like thickenintr iu the 

 I»lac< of the umbilicus. 



Species 192. (Mas. Cuming.) 



Helix galactostoma. Jlel. testa umillicatd, conrexo- 

 orbiculari, solidd, striata, sub leiite <jranulata,fultd ; 

 npirn breti, fomicata, obttitd; anfractiiui qualuor ad 

 quinqut, conccxiiucuUs, sentim accre-icentibm, penultimo 

 anyvlato, ultimo aperturarn terms rotundato, antice 

 defkxo, ban in umbUicum subamplum stdiangulatim 

 Hescendente ; aperturd perobliqud, luuari-otali, inius 

 lacted ; perittomate >ubincraimto,fMcuh-liinbato, mar- 

 ffinibut conniveniibus, callo juiiciis, dextro brevimme 

 expanto, basali reflexo, columellari albo, supra nmbili- 

 cum dilataio-reflexo. 



The MiLKY-MOiTU Helix. Shell umbilicated, convexly 

 orbicular, solid, striated, granulated beneath the lens, 

 fulvous ; spire short, arched over, obtuse : whorls 

 four to five, rather convex, enlarging gradually, last 

 whorl but one angled, the last rounded towards the 

 aperture, deflected in front, descending subangidarly at 

 the base into a rather large umbilicus ; aperture very 

 oblique, lunar-oval, milk-white within; lip slightly 

 thickened, edged with pale brown, margins approxi- 

 mating, joined by a caUosity, right margin very 

 shortly expanded, basal reflected, columellar margin 

 white, dilately reflected over against the umbilicus. 



Pfeiffer. Pro. Zool. Soc. 1S49, p. 131. 



Hall. ^ladagascar. 



An extremely characteristic species, with a rather more 

 depressed form than might be gathered from the fore- 

 shortened position of the shell in the accompanying figure. 



The red Helix. Shell umbilicated, rather depressed, 

 thin, closely striated, slightly decussated with ob- 

 solete concentric lines, reddish-olive, homy ; spire 

 but little raised ; whorls six, rather convex, the last 

 dilated, more convex at the base, angled above the 

 middle, angle more obscure towards the aperture; 

 aperture subvertical, lunar ; lip simple, obtuse, colu- 

 mellar margin vcrj' shortly dilated. 



Lesson, Voyage de la Coquille, p. 305. pL 13. f. 2. 



Hab. Mauritius; Guerin. New Ireland ; Lesson. 



Distinguished by its neat sculptiu-e of spiral and ob- 

 lique striae, the latter of which are the stronger, and by 

 its angular, sometimes faintly biangular, growth above 

 the centre of the last whorl. 



Species 193. (Tig. a, b, Mas. Cuming.) 



Helix BCPA. Hel. tettd unibilicatd, depretsiusculd, tenui, 

 confertim striata, lineis concentricis obsoletis subde- 

 cussatd, rufo-olicaced, corned; tpird parum elevatd ; 

 anfractibus sex, concexiusculis, ultimo dilatato, basi 

 contexiore, supra medium angulato, angulo nntice 

 evanescente ; aperturd subvert icali, lineari ; peritto- 

 mate simplici, obluso, margine columetlari brevissime 

 dilatato. 



Species 194. (Mus. Cuming.) 



Helix Lancula. Hel. testd umbilicatd, orbiculari, de- 

 pressd, oblique striata, lineis con/ertissimis spiralibus 

 sub lenle decussatd, nitidi fulvd, olivaced, carinatd, 

 carina nntice subobsoletn ; spird parum elatd, pallidd ; 

 anfractibws quatuor, planatis, ultimo basi planiusetilo, 

 circa umbilicum mediocrem, non pervium, suiangulato; 

 aperturd perobliqud, transverse luuato-ellipticd ; peri- 

 stomate siUiincrassato, breviter reflexo, marginibus callo 

 introrsum diffusa junctis, dextro diUitato, depresso, 

 basali strictiusculo, cum columellari obliquo angulum 

 obtusissimum formante. 

 The SCALE-BASIN" Helix. Shell umbilicated, orbicular, 

 depressed, obliquely striated, decussated beneath the 

 lens with very close-set spiral lines, shining fulvous- 

 olive, keeled, keel somewhat obsolete anteriorlv ; 

 spire but little raised, pale ; whorls four, flattened, 

 the last rather flat at the base, rather angnlated 

 around the umbilicus, which is confine<l ; aperture 

 very oblique, transversely lunar-elliptical ; lip rather 

 thickened, shortly reflected, margins joined by a 

 callous layer, whicii is difl'used internally, right mar- 

 gin dilated, depressed, basal margin rather drawn 

 out, forming a ver}' obtuse angle with the oblicjue 

 columellar margin. 

 Fercssac, Hist. Moll. pi. 65. f. 4-6. 

 JIai. Madagascar. 



Of a jK'cidiar lcntic\ilar form, verj' depressed towards 

 the periphery, with the umbilicus very much contracted. 



