HELIX. 



Plate CLXXIV. 



Species 1170. (Mus. Benson.) 



Helix 0RCUL.\. IIkI. testa umbilicatu, conico-globotu, 

 teniii, irreyiilariter coalitlalo-alriala, scabrd, cornea, 

 Iranslucenle ; npira oblme conicd ; aiiturd pro/uiiJtt ; 

 anfractiljiis Iribiia ad rjuatiior, rolioidalia, ultimo cij: 

 descendeiite ; apertitrd perobliqud, lunato-roliindaid ; 

 peristomate siiiiplici, recto, marr/in'diua mbconniceiitibiui, 

 columellari rijhxiiisciilo, umbiliciim aeiiiiteijeiite. 



The little tun Hklix. Shell umbilicated, eonically 

 globose, thin, irregularly rib-like striated, rough, 

 horny, transparent ; spire obtusely conical ; suture 

 deep ; whorls three to four, rounded, the last scarcely 

 descending ; aperture very oblique, lunar-rounded ; 

 Up simple, straight, margins rather approximating, 

 columellar margin a little reflected, half-coveriug the 

 umbilicus. 



Benson, Ann. and Mag. Xat. Hist. 1850, vol. \i. p. 251. 



llab. Bahar and Bengal, India (on trunks of trees); Dr. 

 Bacon. 

 A verj' minute species, partaking somewhat of the form 



of Paludina. 



Fig. 1177. (Mus. Benson.) 



The shell here figured is the IlelLc siiblesta of Benson, 

 lately described in Ann. and Mag. Nat. Hist. 1S53, vol. xi. 

 p. 30. On examination, however, it proves to be opereu- 

 latcd, and should be referred to the genus Cycloaloma. It 

 is from Freemautle, West Australia. 



Species 1178. (Mus. Benson.) 



Helix Barclayi. Uel. testa minute umbilicatd, parvuM, 

 lurbinatd, cornea, scabrd, rude oblique teviterque stri- 

 ata ; spird conoided, apice obtusiuscutd ; suturd lecitirr 

 impressd, viarginatd ; anfractibus quinque ad sex, lente 

 crescentibus, convexiusculis, ultimo subtus convexiore, 

 nitidulo, medio impresso, peripherid leviter earinato, 

 carind antice evanescente ; aperturd parum obliqud, 

 suianffulato-lunari ; peristomate tenui, acuto, margine 

 columellari brevi, rejlexiusculo. 



Barclay's Helix. Shell minutely umbilicated, rather 

 small, turbinated, iioniy, rough, rudely obliquely 

 lightly striated ; spire conoid, rather obtuse at the 

 apex ; suture lightly impressed, margined ; whorls 

 five to six, increasing slowly, rather convex, the last 

 more convex underneath, shining, impressed in the 

 middle, periphery' slightly keeled, keel disappearing 

 in front ; aperture but little obli(jue, subangularly 

 lunar; lip thin, sharp, columellar margin short, a 

 little reflected. 



Benson, Ann. and Mag. Nat. Hist. 1850, vol. vi. p. 252 

 Ilab. Moka, Mauritius (under stones) ; Dr. Bacon. 



A minute, deprcssly-acuminated, homy shell, a lilllc 

 excavated underneath. 



Species 1179. (Mus. Benson.) 



Helix talldicola. Eel. testa umhilicald, »ubglolioao-de- 

 pressd, tenui, strialuld, opaciter atid, punctis tr 

 centibus fasciisque strigiste purpurea -fuscis m- 

 spird elevatiuscttld, fusco-rubenie, apice obtutiutculo, 

 eorneo ; anfractibus quinque ad sex, concexis, ultimo 

 injliito, interdum omnino eel versus aperturam purpu- 

 reo-fusco; aperturd rotundato-lunari, intu* fused; pe- 

 ristomate simplici, margine columellari dilatato, reflexo. 



TuE MARSH Helix. Shell umbilicated, somewhat glo- 

 bosely depressed, thin, finely striated, opake-white, 

 omamcDtcd with transparent dots and puq)le-brown 

 bands and streaks ; spire rather elevated, brown-red, 

 apex rather obtuse and horny ; whorls five to six, the 

 last inflated, sometimes jmrple-brown altogether or 

 towards the aperture ; aperture rotundatcly lunar, 

 brown within ; lip simple, columellar margin dibtcd 

 and reflected. 



Benson, Ann. and Mag. Xat. Hist. 1850, vol. ri. p. 253. 



Ilab. Cape of Good Hope (in flowers of Zanledeschia .Ethio- 

 pica, in a marsh at Baszaanns Kraal) ; Benson. 



This little characteristic species is opake-white in places, 

 owing to the epidermis being deciduous, and liable to peel 



off. 



Species 1180. (Mus. Benson.) 



Helix sabi'LETORUM. Tlel. testa mnbHicald, orbiculafo- 

 depressd, soUdiusculd, utrinque cot^fertistime striata, 

 jilicisque arcualis distantioribut notatd, non nitente, pal- 

 lide corned ; spird conrexiusculd, apice obtutd ; suturd 

 profundd ; anfractibus quatuor ad quinque, Ifnti ae- 

 crescentibus, conrexi.1, ultimo rotundalo ; > 'i- 



usculo, prof undo : aperturd vix obliqud, c /- 



dald ; peristomate simplici, marginibui conmirmtUius, 

 columellari breciter snbreflexo. 



The sands Hklix. Shell umbilicated, orbicularly de- 

 pressed, rather solid, very closely striated on both 

 sides, marked with arched distant plaits, not shining, 

 pale horny ; spire mther convex, obtuse at the n|K>x ; 

 suture deep; whorls four to five, inrrensing slimly, 

 convex, the last rounded ; umbilicus rather broad and 

 deep; aperture slightly oblique, lunar- rounded ; lip 

 sinqile, with the margins approximating, columellar 

 margin shortly slightly reflected. 



October, is 53. 



