HELIX. 



Plate CV. 



Species 581. (Mus. Cuming.) 



Hf.lix curvilabrum. lid. {esld umbiUcatd, coiiicd,iaii 

 acute carinatd, Icevi, Jlavtcaiite, prope sulitrum cinyulo 

 lato rufo-cadaneo ornatd, bad planiusculd, omnino cas- 

 taned ; aiifracfiim quinque ad Hex, planatk ; aperturd 

 aubauf/idald, dipn-aisd, obliqud, margine siiperiore dila- 

 talo, injlexo; peridomale incrassaio. 



The cnuvED-LiP Helix. Shell umbilieatcd; conical, 

 sharply keeled at the base, smooth, yellowish, orna- 

 mented witli a broad reddish-chestnut belt near the 

 suture, rather ilat and chestnut-coloured at the base; 

 whorls five to six, flattened ; aperture somewhat an- 

 gular, depressed, oblique, upper margin dilated, in- 

 flected ; lip thickened. 



Adams and Reeve, Zool. Voy. Samaraug, Moll. p. 59. 

 pi. U. f. 9fl,i. 



Hab. I'hilippine Islands. 



A flat conical shell, conspicuously umbilieatcd, with the 



upper lip peculiarly curved at the edge. The base is of a 



dark reddish-chestnut, the spii-e yellowish, encircled by a 



chestnut belt next the suture. 



Species 582. (Mus. Belcher.) 



Helix tropidopiioka. Hel. tedd imperforatd, stibdis- 

 coided, acute elfort'der carinatd, brunned, drili minulls 

 confertk reticulatd ; aiifractibus quinque, convexiuscu- 

 lia ; aperturd lunato-tra)iiverm,angulaid ; peristomate 

 simplici, acuto. 



TuE keel-bearing Helix. Shell imperforated, some- 

 what discoid, sharply and prominently keeled, brown, 

 reticulated with close-set minute striae ; whorls live, 

 rather convex ; aperture lunar-trausverse, angled ; lip 

 simple, sharp. 



Adams and Reeve, Zool. Voy. Samarang, Moll. p. 59. 

 pl.U. f. U. 



Hab. Borneo. 



A comparatively thin shell, with simple Lp, shai-ply and 

 prominently keeled, with a sliining horny base. 



Species 583. (Mus. Belcher.) 



Helix tradita. Hel. testa late et profundi umiilicatd, 

 discoided, olivaced, oblique striata, striis transversis 

 distinct is decussatd; spird depressd ; anfractibus qua- 

 tuor ad quinque, rotundatis ; aperturd lunato-rotundatd, 

 labro simplici, acuto. 



.June, 



The traditional Helix. Shell broadly and deeply 

 umbilieatcd, discoid, olive, obliquely striated, decus- 

 sated with distinct transverse stria; ; spire depressed ; 

 whorls four to five, rounded; aperture lunatcly 

 rounded, lip simple, sharp. 



Helix obscurata, Adams and Reeve (not of Porro), Zool. 

 Yoy. Samarang, .Moll. p. .">9. pi. \\. f. IS. 



Ilab. Borneo (under dccayeil leaves in the forests); .Vdams. 



A small rounded species, belonging to the type repre- 

 sented in PI. 97. Sp. 530-534. 



Species 5Sl. (Mus. Cuming.) 



Helix trigonostoma. Hel. testd imperforatd, Trochi- 

 formi, tenui, obliqui striatuld, lineis iwuHuUis conceit- 

 tricis impressis notatd, nlbd,fa»ciis superne Uneardms, 

 bojii latioribus, fusco-violaceis oruatd ; spird lali co- 

 nicd; anfractibus quatuor ad quinque, ploHiHtculU, 

 ultimo spiram superante, obsolete anijulato ; • 

 brevi, callosd ; aprrturd subtriangulari ; j- 

 simplici, maryine supero parum erpaiuo, coluineHan 

 appresso, rejlexo. 



The TRiANGULAR-MOt'TH Helix. ShcU imperforated, 

 Trochus-shaped, thin, oblii|uely finely striated, marked 

 with some concentric impressed lines, white, omn- 

 mented with brown-violet bonds, which on the uppt-r 

 part of the shell arc linear, on the lower broader . 

 spire broadly conical ; whorls four to five, nther tint, 

 tlie last exceeding the spire, obsoletely angled ; colu- 

 mella short, callous ; aperture somewhat triangular ; 

 lip simple, upper margin but little expanded, colu- 

 mellar margin apj)ressed, reflected. 



Pfeiffeu, Pro. Zool. Soc. 1815, p. H. 



llab. Vera Cruz, Honduras. 



A characteristic milk-white shell encircled with brown- 

 violet lines about the spire, and with distinct bands at thr 

 base. 



lb- 



Species 585. (Mus. Belcher.) 



Helix calliostoma. IM. testa olf '' ' ' 



conicd, aaile carinatd, tuprrne , iqui 



striata, striis interruptis, lineis imprttsis conjerli de- 

 cussatd, albd, ringuhs anguslis macHlisjMe rnfo-eiolas- 

 centiljus circumdatd ; anfractibus quatuor ad quinque, 

 planiusculis, ultimo iifra cariHaiH concaeo, basi con- 



1852. 



