HELIX.— Plate CXXVI. 



which is stii|)i)cd of its epidermis, and not, therefore, 

 brown, as described above, is the only one I have seen. 



Species 758. (Mus. Cuming.) 



Helix Jeevisensis. Hel. teata subobtecle umbilicatd, glo- 

 boso-depressu, solu/iiisculd, ru/encente-fuscd, obscure /an- 

 ciald, subttts pallidi olivaced, circa umbilicum fmcd ; 

 anfractibiu sex, coiivexi*, obligiie rude plicalo-atrialU ; 

 aperlurd oblique lunari ; pcristomate subincrassato-re- 

 Jlexo, margiiie coluuiellari dilalato, umbilicum iegcnk. 



TuE Jebvis Bay Helix. Shell with a nearly covered 

 umbilicus, globosely depressed, rather solid, reddish- 

 l)rowu, obscurely banded, pale olive beneath, brown 

 around the umbilicus ; whorls six, convex, obliquely 

 rudely plicately striated ; aperture obliquely lunar ; 

 lip somewhat thickly reflected, columellar margin di- 

 lated, covering the umbilicus. 



QuoY and Gaimard, Voy. dc 1' Astrolabe, vol. ii. pi. 1(1. 

 f. 26-30. 



Hab. Jervis Bay ; Quoy and Gaimard. Brisbane AVater 

 (under logs in dry, stony, and scrubby ground) ; 

 Macgillivray. 



Allied to //. Grayi, and somewhat similarly painted, 

 but of much nioro solid obliquely compacted growth. 



Species 759. (Mus. Cuming.) 



Melix tenuis. Hel. testd imperforatd, subglobosd, tenni, 

 fused, rufo-zonatd, lineis obsoletis impressis concenlricis 

 noiaid, epidermide tenuissimd serimnd induid ; spird 

 obtusiusculd ; anfractibua ijuinque, celeriter accresccn/i- 

 bm, vix convexinsculis, ultimo maijno, injiato, ad colu- 

 mellam obUquam subtortam excavalo ; aperlurd lunnlo- 

 ovali ; peristomate recto, simplici, ban subincrassato. 



The thin Helix. Shell imperforated, subglobose, thin. 



brown, red-zoned, marked with obsolete concentric 

 impressed lines, covered with a very thin sdken epi- 

 dermis ; spire rather obtuse ; whorls five, increasing 

 rapidly, but little convex, the last large, inflated, 

 excavated at the columella, which is oblique and 

 rather twisted ; aperture lunar-oval ; lip straight, 

 simple, slightly thickened at the base. 



Pfeii'FEE, Pro. Zool. Soc. 1845, p. 41. 



Hab. ? 



A very distinct and characteristic species, of which the 

 habitat is not yet known. 



Species 760. (Mus. Cuming.) 



Helix PTYCHOMPHala. Ilel. testa ampliter miiiilieatd, 

 subdepressd, superni creberriine rwjuloso-striutd, utriit 

 compicue elevalis, subtus Itevii/ald, ru/u-castaned, iipice 

 rosed, circa umiilicum lutescenle ; anfracl'diu* ijualnor 

 ad quinque, coiivexo-declivibus, ultimo antici drjiexo , 

 uniiilico perspeclivo, pro/undo, plicato-ruyuloso ; api-r- 

 turd oblique lunari; peristotiuit^ simpliei, manjinibtu 

 conniventibus. 

 The plicated chbilicus Helix. Shell largely umbili- 

 cated, somewhat depressed, very closely ruguJosely 

 striated at the upper part, the stria? being conspi- 

 cuously raised, smooth underneath, reddish-chestnut, 

 pink at the apex, yellowish around the umbilicus ; 

 whorls four to five, convcxly slanting, the last de- 

 flected in front ; umbilicus pirsjiective, deep, plicately 

 ^vriukled; aperture obliquely lunar ; lip simple, with 

 the margins approximating. 

 Pfliffeh, Pro. Zool. Soc. 1852. 

 Ilab. Port Essington. 



Of a CyclostomaASat form, with the whorls peculiarly 

 slanting, not to say depresseil, round the upper part, with 

 a large wrinkle-lined umbilicus. 



