HELIX.— Plate XXXIII. 



iubpellucidu, valdi el con/ertim plicatu, in interstiliiji 

 minuti »piraUter ulrwld, rii/d tel lutescetite-fuicd ; spi- 

 rd coHoideo-temxtjlobond ; anfractihuit quiiique, cunvexu, 

 ulliiHo vetttricoto, anlice vijr descendenle, circa utnbUicum 

 miijutlum compresxo ; npertiird siifjcer/icali, rotutulato- 

 luiiari ; perialomate vij- rxpaiwj. alio, maryiiie coluniel- 

 tari ditaiato-paUnte. 



MifiHKLs' Helix. Shell umbilicatcd, ■jlobost, subpel- 

 lucid, strongly and closely plicated, minutely spiruUy 

 striated in the interstices, reddish or yellowish-brown; 

 spire conoidal-semiglobose ; whorls five, convex, the 

 lost ventrieose, sciircely descending in front, com- 

 pressed around a narrow umbilicus ; aperture nearly 

 vertical, rotundately lunar; lip scarcely expanded, 

 white, coluinellar edge dUately open. 



Pfeiffer, Pro. Zool. Soc. 1810, p. 110. 



Hab. Surigao, Isknd of Mindanao, Philippines ; Cuming. 



Characterized throughout by an irregular closely plicated 

 concentric sculpture. 



Species 144. (Fig. a, b, Mus. Cuming.) 



Helix brevidens. IIel.le»tdundtilicatd,depreud,tenm- 

 iiscii/d, minuii ijranulatd, pallidi fused, lined fmru 

 ■iiiperne circumdald ; spird subplanulatd ; anfractibm 

 quatuor, planiiMCulig, ultimo basi inflalo ; unMlico an- 

 ffiialu, Hemilecio ; aperturd liinari, inliix aUtd ; peri- 

 slomaie simplici, rejlexo, margine roluniellari expanso, 

 batali unidenlato. 



The short-tooth Helix. Shell umbilicated, depressed, 

 rather thin, minutely granulated, pale brown, eueiiclcil 

 at the upper part by a brown line ; spire rather 

 flattened ; whorls four, rather Hat, the last inflated at 



the base ; umbilicus narrow, half-covered ; aperture 

 lunar, interior white; lip simple, reflected, colu- 

 mcUar edge expanded, basal edge one-toothed. 



SowERBY, Pro. Zool. Soc. 1841, p. 25. 



Ilab. Puerto Galero, Island of Mindoro, Philippines; 

 Cuming. 



The granules by which tliis species is characterized 

 appear to belong to the epidermis. 



Species 145. (Fig. a, A, Mus. Cuming.) 



Helix 1}ecki.\na. Hel. tedd umiilicatd, orbiculari, tenui, 

 ijbliqiii striata, fmcd,vix niliduld ; itpird parum elata ; 

 sttturd lineari ; anfractibm sex, planiusculi-s, ultimo de- 

 flexo, basi pluniusculo, ad peripheriam anyulalo ; anguto 

 ad aperluram obsoleto ; umiilicu majusctdo, pernio; 

 aperturd fere liorizontali, stdjtrapezoidali ; peristomate 

 calloso, margine columellari brevi, basali reflexo, quati 

 in tubercnlum incrassato. 



Beck's Helix. SheU umbUicatcd, orbicular, obliquely 

 striated, brown, scarcely shining; spire but little 

 raised; suture linear; whorls six, rather flattened, 

 the last deflected, rather flattened at the base and 

 angled at the periphery ; angle obsolete next the 

 aperture ; umbilicus rather large, open ; aperture 

 nearly horizontal, subtrapezoid ; lip callous, colu- 

 mellar edge short, basal edge reflected as though it 

 were thickened into a tubercle. 



Pfeifkeh, Pro. Zool. Soc. 1842, p. 87. 



Eadem var. Uelix Kierulfii, Pfeilfer. 



llab. Island of Luzon, Philippines ; Cuming. 



The callous thickening of the lip is a peculiarity to be 

 observed in this species. The variety noticed above is of 

 lighter substance, with the whorls more spread. 



