IIKLIX.— I'LATE CXXX. 



Helix omega, Pfeiffer. 

 JIab. New Zealand. 



The whorls of this species slant towards the periphery 

 at the upper part, aud at the lower are concavely com- 

 pressed. 



Species 792. (Mus. Cuming.) 



Helix obnubil.'i. Ilel. tenia umbilicald, depressd, in- 

 lemi fused, sulcis impresais sjjiraliius driisque obliquh 

 undique decmsatd ; spird depresm, sitlurd dislincld ; 

 aiifracliius quinque, plario-cojitexis, ultimo rotundato ; 

 aperliird lunari ; peristomale simplici, aculo. 



The dtsky Helix. Shell umi)ilicatpd, depressed, dusky 

 brown, decussated with impressed spiral grooves and 

 oblique striic ; spire depressed, suture distinct ; 

 whorls five, flatly convex, the last rounded ; aperture 

 lunar ; lip simple, sharp. 



Helix sigma, Pfeiffer. 



Hal). New Zealand. 



Of a peculiarly dark dusky-brown colour, decussated 

 with oblique stria; and distinct spiral grooves. 



Species 79.3. (Mus. Cuming.) 



Helix pyxis. HkI. testa imperforatd, pyramldali-globosd, 

 diaphand, soliduld, pellucido-aUid, nitente ; anfraclibus 

 qiialuor ad quinque, subrotundal'is, carina angusld 

 acuta medio cingulalis ; aperlurd horizonlali, subcircu- 

 lari ; peristomale aculo, rejlexo. 



The box Helix. Shell imperforated, pyramidally glo- 

 bose, diaphanous, rather solid, transparent white, 

 shining; whorls four to five, somewhat rounded, en- 

 circled round the middle with a sharp narrow keel ; 

 aperture horizontal, nearly circular; lip sharp, re- 

 flected. 



Hinds, Zool. Voy. Sulphur, Moll. p. 55. pi. 19. f. 10. 



Hah. ? 



.V very characteristic species, of rather solid growth, but 



yet of deliciitc transparent white substance, encircled by a 



narrow sharp keel-like ridge. 



Species 794. (Mus. Cuming.) 



Helix Kivi. Hel. testd imperforald, turbinatd, alba, 

 tenui, oblique con/erlim striata', slrigis brevibus irregu- 

 laribus obliquis purpureo-brunneis ornatd ; npird sub- 

 conicd, obtusd; anfrnctibus sex, planiusculis, ultimo 

 rotundato, basi convexo, leevigato ; aperlurd laid, lu- 



nari ; peristomale simplici, rejlexo, margine columellari 

 rejlexiusculo. 



Tue Kivi Helix. Shell imperforated, turbinated, white, 

 thin, obli(|Uely closely striated, ornamented with short, 

 irregular, oblique, ])urple-brown stripes ; spirt sub- 

 conical, obtuse ; whorls six, rather flat, the last 

 rounded, convex and smooth at the base ; aperture 

 broad, lunar ; lip simple, straight, columtUar margin 

 slightly reflected. 



Gray, Diuffenbach's Travels, vol. i. p. 2C2. 



Hab. New Zejilaud. 



The brown stripes which distinguish this species are 

 broad, short, and rather distant, not seen from the under- 

 side of the shell. 



Species 795. (Mus. Cuming.) 



Helix impexa. Uel. testd vix umbilicald, concexo-de- 

 pressd, pellucido-corned, tenui, niteitte ; spird obtusd; 

 anfraclibus quatuor ad quinque, superne decUcibus ; 

 aperlurd transverse lunari; peristomale tenui, acuta, 

 margine columellari lenue dilatalo. 



The undecked Helix. Shell scarcely umlilicated, con- 

 vexly depressed, transparent horny, thin, shining ; 

 spire obtuse ; whorls four to five, slanting at the 

 upper part ; aperture transversely lunar ; lip thin, 

 sharp, eolumellar margin thinly dilated. 



Helix inconspicua, Forbes (not of Benson), Voy. llattle- 

 snake, App. p. 372. pi. 2. f. 3. 



Hab. Islet in Trinity Bay, Australia ; Macgillivray. 



Of very simple character, without sculpture or marking. 



Species 796. (Mus. Cuming.) 



Helix coma. Hel. testd late umbilicald, depressd, pallide 

 fused ; spird planulald ; anfraclibus quinque, concrxis, 

 oblique el confertim acute elecalo-line'itis,fHScostriatit ; 

 umbilico conico, perspectico ; aperlurd perobliqud, ro- 

 tundato-lunari ; peristomale simplici, tenui. 



The hair Helix. Shell broadly unibilioatcd, depressed, 

 light brown; spire flattened; whorls five, convi-x, 

 obliquely and closely, sharply, elevately lineated, 

 brown-striated; umbilicus conical, pors])eetive ; aper- 

 ture very oblique, rotundately liuiar; li]) simple, thin. 



Zoniles coma. Gray, Dicffenbach's Travels, vol. i. p. 263. 



Hab. New Zealand. 



The whole spire of this shell is a>nspicuous, blulchcd 

 and raved with ehcstnut-rcd. 



