HELIX.— Plate CLVII. 



ated bcnenth the lens, pinkish-white, very elosely pro- 

 fusely encircled with fine black lines, apex and colu- 

 mella deep rose; spire obtuse, apex uude; whorls 

 four, rapidly increasing, rather convex ; aperture 

 somewhat squarely lunar; lip simple, thinly rolled 

 back at the columella. 



Pfeiffeh, Pro. Zool. Soc. 1853. 



Hab. Great Salvages Island, Madeira. 



The characters of this species, as may be seen by the 

 description and figures, are peculiarly distinct from any 

 hitherto discovered. 



Species 1031. (Mus. Hamilton.) 



IIllix nasota. Hel. testa angmlimme umbilkald, sinh- 

 trali, depresso-orbiculari, ad peripheriam acutissinte 

 carinatd, aureo-slramined, corned, valde pellucidd, ad 

 carinam saturatiure, arcualim ^riatd, striis ad su- 

 turam subplicalis, slriii spiralibus inipressis sub lente 

 subliUssiini dense dectissald ; spird convexo-obtmd ; 

 anfractibus quinque, planulatis, ultimo ad aperturam 

 pecuUariter productd et iiplionatd ; aperturd anguste 

 securiformi ; peridomate subrejlexo. 



The xosed Helix. Shell very narrowly iimbilieated, 

 sinistral, depressly orbicular, very narrowly keeled, 

 golden-straw colour, horny, very transparent, darker 

 at the keel, arcuately striated, strise slightly plicate 

 at the suture, veiy closely densely decussated be- 

 neath the lens with impressed spiral striae; spire 

 convexly obtuse ; whorls five, flattened, the last pe- 

 culiarly produced and siphoned ; aperture narrowly 

 hatehet-shapcd ; bp slightly reflected. 



Metcalfe, Pro. Zool. Soc. 1852. 



Hah. Sarawak, Borneo ; Eajah Brooke. 



An extremely transparent horny shell, of a pure golden- 

 straw colour without pattern or marking, having the keel 

 ])rodueed into a curious siphon at the aperture. 



Species 1032. fMus. Cuming.) 



Helix Ak.mida. Jlel. testa angusti umbilicatd, orbiculari- 

 depressd, areuatim striata, sordide fuscescente, nitente, 

 ad sutiiram peculiariler carinatd ; spird obtuse con- 

 vexd; anfractibus sex, angustis, lente accrescentibus, 

 supra carinam planulatis, infra convexis ; aperturd 

 transverse lunari ; peristomate simptici. 



The A.BMIDA Helix. Shell narrowly umbilicated, orbi- 

 cularly depressed, arcuately striated, dull light brown, 

 shining, peculiarly keeled at the suture ; spire ob- 

 tusely convex ; whorls six, narrow, increasing slowly, 



flattened above the keel, convex below it ; aperture 



transversely lunar ; lip simple. 

 Pfeiffek, Pro. Zool. Soc. lSo3. 

 Hab. Mount Isarof, Island of Luzon, Philippines (on 



bushes). 



Characterized by a peculiar cord-like keel at the peri- 

 phery, which is seen throughout the spire in the place of 

 the suture. 



Species 1033. (Mus. Cuming.) . 



Heli.\ FRICATA. Hel. testd umbilicatd, depresso-orbicu- 

 lari, aubdiscoided, areuatim plicato-striatd, corned, li- 

 neis duabus rujis remoli cingulatd ; spird obtuse de- 

 pressd ; anfractibus quatuor ad quinque, plano-decli- 

 vibus ; aperturd transverse ovato-lunari ; peristomate 

 teiiui, simplici. 



The bobbed Helix. Shell umbilicated, depressly orbi- 

 cular, somewhat discoid, arcuately plicately striated, 

 horny, distantly encircled with two red lines ; spire 

 obtusely depressed ; whorls four to five, flatly slant- 

 ing; aperture transversely ovately lunar; Up thin, 

 simple. 



Gould, Expedition Shells, 1851, p. 32. 



Uab. Australia. 



Of the two characteristic red lines which encircle this 

 species, one is at the periphery, and the other at the 

 suture. 



Species 1031. (Mus. Cuming.) 



Helix Bridwilli. Uel. testd imperforatd, pyramidali- 

 conicd, Itevigntd, alba, ustulato-fusco lineari-maculatd, 

 basi saturatiore maculatd, peristomate et pariete in- 

 terna intense nigro-fuscis ; spird elevatd; anfractibus 

 sex, planulatis, ultimo acute angulato, basi pkinato ; 

 aperturd ovatd, horizoutali ; peristomate tenue refiexo, 

 tnarginibus lamina callosd junctis, margine basalt ap- 

 pressd. 



Bridwill's Helix. Shell imperforated, pyramidally 

 conical, smooth, white, linearly spotted with burnt- 

 brown, darker-spotted at the base. Up and internal 

 wall veiy dark black-brown ; spire raised ; whorls 

 six, flattened, last whorl sharply angled, flat at the 

 base ; aperture ovate, horizontal ; lip thinly R'flected, 

 margins joined by a callous lamina, basal margin ap- 

 prcssed. 



Pfeiffek, Pro. Zool. Soc. 1853. 



Uab. Wide Bay, Australia (on the bark of trees) ; King. 



.\ rather solid species, pecidiarly blotched aud lincated 

 with lidit bmut-brown. 



