Zoohffical Society. 139 



thickness of unclassified strata in the Isle of Wight is 400 feet, 

 if not more, and within this range are at least two distinct sets ot 

 organic remains. The fluvio-marine beds in all, including the Headon 

 series, are very nearly 600 feet thick. 



ZOOLOGICAL. SOCIETY. 



May 27, 1851.— W. Yarrell, Esq., V.P.L.S., in the Chair. 



Description of new Land Shells from the Collection 



OF H. Cuming, Esq. By Dr= L. Pfeiffer. 



1 Helix audebardi, Pfr. H. testd imperforatd, conoideo- 

 globosd, soliduld, nitidd, castaneo-fulvd, strigis saturatioribus 

 confertis ornatd ; spird conoided, apice obtusiusculd, albidd; an- 

 fractibus 5^ convexis, summis gramlatis, ultimis irregulanter 



rugoso-striatis, ultimo inflato , antice deflecco ; columelld perdeclivi. 

 subarcuatd, laid, pland, alba; aperturd perobliqud. truncato-ovah, 

 intus caruled, nitidd ; peristomate incrassato, subreflexo, albo. 



Diam. maj. 48, min. 39, alt. 35 mill. 



Hab. St. Domingo {SalU). 



2 Helix albersiana, Pfr. H. testd umbilicatd, subturbinato- 

 depressd, tenui, acute et confertim costatd, diaphand, rufo-corned; 

 spird subturbinatd, apice acutd; anfractibus 4^ convexis, celeriter 

 accrescentibus, ultimo antice deflexo, basi juxta umbihcum an- 

 guste constricto ; aperturd perobliqud, lunato-ovali ; peristomate 

 tenui, marginibus subconniventibus, dextro breviter expanso,colu- 

 mellari dilatato, reflexo, intus plied obliqud, dentiformi mumto. 



Diam. maj. Uf, min. 12, alt. 8^ mill. 

 Hab. St. Domingo (SalU). 



3 Helix pubescens, Pfr. H. testd angustissiml umbilicatd, 

 depressd, tenui, pilis mollibus, brevibus, confertis pubescente, dia- 

 phand, lutescente; spird vix convexd, obtusd ; anfractibus 5, con- 

 vexiusculis. ultimo subrotundato, altiore quam lato, non descen- 

 dente; aperturd vix obliqud, rotundato-lunari ; peristomate sm- 

 plice, recto, margine columellari superne breviter reflexo. 



Diam. maj. 11, min. 10, alt. 6 mill. 

 Hab. St. Dommgo (SallS). 



4. Helix leucorhaphe, Pfr. H. testd anguste umbilicatd, 

 depresso-turbinatd, subtilissime striatuld, diaphand, luteo-corned, 

 fascid angustd, cretaced, ad suturam ornatd; spird subturbinatd, 



apice obtusiusculd ; anfractibus 6 planiusculis, ultimo convexwre, 

 non descendente, basi subplanato ; aperturd vix obliqud, lunari; 

 peristomate simplice, recto, margine columellari reflexiusculo. 



Diam. maj. 10, min. 9, alt. 6 mill. 



Hab. St. Domingo {Salle). 



5. SucciNEA DOMiNiCENSis, Pfr. 8. tcstd ovali, soliduld, sub- 

 striatd, corneo. albidd. punctis corneis irregulariter aspersd ; spird 

 conicd. acutd; anfractibus 3^ convexis, summis corneis, ultimo 



10* 



