HELIX. 



Plate CCIII. 



Species 1426. (Mus. Cuming.) 



Helix Extensa. Ilel. tenia imperforatd, mbglobosa, densi 

 plicato-slriala, and epidermide decidiid fulvescenle- 

 albd, interdum diaphaiw-albd ; spird brevi, oblusd ; 

 anfractibiis qualuor, planidalis, ultimo convexo, in- 

 fiato, ad aperturam obliijue extemo ; aperturd lunato- 

 ovali, tenne rejlexd, ad coliwiellam aiibcalload. 



TuE DRAWN-OUT IIelix. Slicll imperforated, subglo- 

 bose, densely plicatcly striated, I'ulvous white be- 

 neath a deciduous epidermis, sometimes diaphanous 

 white; spire short, obtuse; whorls four, rather flat, 

 the last convex, inflated, obliquely drawn out at the 

 aperture ; aperture lunar-oval, thinly reflected, rather 

 callous at the columella. 



MuLLER, Vermes, vol. ii. p. 60. 



Hai. Moluccas. 



A light, rather inflated shell, with the last whorl ob- 

 liquely enlarged at llie aperture. 



Species 1427- (Mus. Cathcart.) 



Helix Cathcart-K. I/el. testd ampUter excavate vmii- 

 licatd, plaiio-orbicidari, depressimind, armaliin ru- 

 guloao-driaid, rubello-corned ; anfraclibm sex, sitpenie 

 planalk, ad sulura-i tenuimarginath, ad peripheriam 

 acute compresse carinatin, infra convexia ; aperturd 

 compresse aeeuri/onni, labro simpUci. 



Cathcart's Helix. Shell largely excavately umbili- 

 cated, flatly orbicular, very depressed, arcuately ru- 

 gulosely striated, reddish-horny ; whorls six, flat at 

 the upper part, finely margined at the sutures, sharply 

 comprcssly keeled at the periphery, convex beneath ; 

 aperture comprcssly hatchet-shaped, lip simple. 



Hub. Island of Typinsan, Meiacoshimas. 



This interesting species, distinctly intermediate in its 

 characters between II. Mackensii and horiomphala, I have 

 the pleasure of naming after the Hon. Jlrs. Macadam 

 Cathcart, by the aid of whose specimen I have been able 

 to identify other specimens collected by Sir Edward 

 Belcher, in the Samarang, and now in Mr. Cuming's 

 cabinet. 



Species 1428. (Mus. Cathcart.) 



Helix mera. Ilel. testa cix umbilicatd, depressi orbicu- 

 lari, corned, nuldiapltana, arcnatini riiguloao-atriatd. 



epidermide lenuiaainid olioaced; apird plano-conrexd ; 

 aiifractibua qiiinijue, acute carinatia, infra conrexo- 

 lumidia ; aperturd angulato-lunari, labro aimplici, ad 

 columellam brniaaimi reflexo. 



TriE PLAIN Helix. Shell scarcely umbilicatcd, depre^sly 

 orbicular, homy, subdiaphanous, arcuately rugu- 

 losely striated, with a very thin olive epidermis ; 

 spire flatly convex ; whorls five, sharply keeled, con- 

 vexly tumid beneath; aperture angularly lunar, lip 

 simple, very shortly reflected at the columella. 



Uab. ? 



Of somewhat similar texture to the preceding species, 

 more tumid below the periphery, and only minutely \un- 

 bilicated. 



Species 1429. (Mus. Taylor.) 



Helix cromiodes. Hel. leata imperforala, depreaao- 

 globond, tenuiaaimd, aeinipelliicidd, olicaceo-fulcd aut 

 vireacente, ad apiceni et auturaa purpuraacente, faacid 

 anguatd epidemiidia Jigdrophanft interdum ad pariplw- 

 riam cingulatd ; apird obtuad ; anfract'diua quatitor, 

 ultimo aubamplo, inflato ; aperturd lunato-otali, labro 

 tenue reflexo, purpiiraaceute. 



The onion-like Helix. Shell imperforated, dcpressly 

 globose, very thin, semi-transparent, olive-fulvous or 

 greenish, purple at the apex and in the sutures, 

 sometimes encircled at the perijiherj' with a yellow 

 band of hydrophanous epidermis ; spire obtuse ; 

 whorls four, the last rather large and inflated ; aper- 

 ture lunar-oval, lip thinly reflected, puqilish. 



Pfeiffer, Pro. Zool. Soc. 1S42, p. 150. 



Hab. Misamis, Island of Mindanao, Philippines ; Cuming. 



This species, which I formerly regarded as a variety of 

 //. coecomeloa, I now believe to be distinct. It is of 

 lighter stmcturc, and unifonnly of a more dcpressly in- 

 flated form. 



Species 14.30. (Mus. Cuming.) 



Helix Buscui. Ilel. teatd imperforala, globoao-conoided, 

 te»iiia.iime alriatd, cctnileaceHte-albd eel apadiceo-ci- 

 triud ; aiifractibua quiiique ad aex, plano-conrexia ; 

 aperturd rotinidtito-liinari, labro trniti reflexo, mar- 

 gine coliiniellari recto, aubcalloao. 



Bl'sch's Helix. Shell imperforated, globoscly conoid, 



December, 1854. 



