HELIX. 



Plate CLXXV. 



Species 1185. (Mus. Pfeiffer.) 



Helix Schrenkii. IM. teatd mediocriter umbilicatd, co- 

 noideo-semif/loiosd, ieiiuiiisculd, siriald et sub lente de- 

 cussaluld, diaphand, corneo-aVAdd, fascid unicd satu- 

 rate castaned, ad suturam ascendenie, ornatd; spird 

 conoided, ohtusidd ; atifractibus sex ad septein, con- 

 vexis, ultimo non descendenie ; aperturd lunato-rotun- 

 datd, labro intus leviter labialo, marline columellari 

 dilatato. 



SchrEiNk's Helix. Shell moderately umbilicated, co- 

 noid, semiglobose, rather thin, striated, and, beneath 

 the lens, finely decussated, diaphanous, horny-white, 

 ornamented with a single dark chestnut band, rising 

 from the suture ; spire conoid, rather obtuse ; whorls 

 six to seven, convex, the last not descending ; aper- 

 ture lunar-rounded, lip slightly edged within, colu- 

 mellar margin dilated. 



MiDDENDORF, Reise Sibir. vol. ii. p. 302. pi. 30. f. 20-26. 



Hab. Siberia. 



A simple horn-white Cyclostoma-\)k.Q species, encircled 

 by a dark chestnut band. 



Species 1186. (Mus. Pfeiffer.) 



Helix Deuxei. Hel. tesld imperforald, subglobosd, soli- 

 duld, sublilissime reticulata, albd, superni fascid latius- 

 culd, subtus angustioribus pluribus luleo-fuscis ornatd; 

 spird bred; atifractibus quinque, planiusculis, ultimo 

 ad peripheriam obtuse angulato, antice paululum descen- 

 denie, basi injlato ; aperturd subverticali, depressd, lu- 

 nari, fauce rosed, labro recto, inlus rubello-labiato, 

 margine columellari rejlexo-appresso. 



Dehne's Helix. Shell imperforated, subglobosc, rather 

 solid, very finely reticulated, white, ornamented with 

 a rather broad yellowish-brown band at the upper 

 part, and several smaller ones beneath ; spire short ; 

 whorls five, rather flat, the last obtusely angled at 

 the periphery, a little descending in front, inflated 

 at the base; aperture subvertical, depressed, lunar, 

 rose in the interior, lip straight, red-edged within, 

 columcliar margin rcflexly appressed. 



RossMASLEU, Zeitschrift fiir Malac. 1816, p. 173. 



Hai. jMrica? 



A globose faintly banded opake-whitc shcU, with a pink 

 mouth, found by Dr. Dehne, among some Arabic gum. 



Species 1187. (Mus. Pfeiffer.) 



Helix Cretica. Eel. testa umbilicatd, depretso-globosd, 

 oblique striatula, aordidi albd, fasciia fuscis interruptit 

 varii pictd; anfractibus sex, convexiuaculit, sensim ac- 

 cresceniiius ; umiilico mediocri, pernio ; aperturd lu- 

 nato-rotundatd, labro aculo, recto, inlu* tenuissime 

 labiato. 



TnE Cretan Helix. Shell umbilicated, deprcssly glo- 

 bose, obliquely finely striated, dirty-white, variously 

 painted with interrupted dirty-brown bands ; whorls 

 six, rather convex, increasing slowly; umbilicus 

 middling, open ; aperture lunar-rounded, lip sharp, 

 straight, vcrj' finely edged within. 



Ferussac, Prodrome, No. 288. Pfeiffer, Symbolae, vol. i. 

 p. 40. 



Ilab. Islands of Candia, Rhodes, and Naxos. 



Very like the British H. virgata, with rather larger um- 

 bilicus. 



Species 1188. (JIus. Pfeiffer.) 



Helix Theodori. Eel. testd umbilicatd, depressd, ienui, 

 subdiophand, comeo-lutesceute, supenti confertissimi 

 costulatd, liiieis concenlricis impressia decussald, bati 

 laciore, excentrice striatuld, liiieii concentricis versus 

 umbilicum seitsim evanescentibus ; spird parum ettxatd, 

 obtusiusculd ; suturd impressd, rufo obsolete marginatd ; 

 anfractibus sex ad septem, cix coucexiusculis, laite acr 

 crescentibiis, ultimo obsolete angulalo ; aperturd de- 

 pressd, lunari, labro siinplici, recto, margine columellari 

 peroblique descendente, superni brevissime reflrxo. 



Theodore's Helix. Shell umbilicated, depressed, thin, 

 subdiaphanous, horny-yellow, vcrj' closely finely rib- 

 bed at the upper part, decussated with depressed 

 concentric lines, smoother at the base, cxccntrically 

 finely striated, the concentric lines gradually fading 

 away towards the umbilicus ; spire but little raised, 

 rather obtuse; suture impressed, obsolctcly edgc<l 

 with red ; whorls six to seven, slightly convex, in- 

 creasing slowly, the last obsolctcly angled ; aperture 

 depressed, lunar, lip simple, straight, colnmrllar mar- 

 gin very obliquely descending, very shortly reflcctoil 

 at the upper part. 



PlIILin-l, Zeitsohrift fiir Malac. 1846, p. 191. 



JIab. .Mergui, East Indies ; Philippi. 



April, 1854. 



