670 MR. W. HARPER PEASE ON NEW LAND SHELLS, [Dec. 13, 
ad januam constricto ; margine acuto, una cum labio continuo ; 
apertura subrhomboidea ; fauce lamellis duabus volventibus in- 
structa ; labro simplici, acuto. 
Diam. 6, alt. 3 mill. 
Hab. Ins. Mangier. 
7. He.ix RETUNSA, Pse. 
H. t. conica ; spira obtusa, depressa, retunsa, rotundata; supra fusco 
et albido tessellata, subtus flammulis fuscis flecuosis radiata ; 
anfr. vil., rotundato-convewis, oblique radiatim costulatis, costellis 
subdistantibus flecuosis, concentrice striatis ; anfr. ultimo ad peri- 
pheriam rotundato, subtus radiatim striato et striis elevatis con- 
centricis notato ; apertura subrhomboidea ; umbilico cavernoso, ad 
januam constricto; margine acuto; fauce lamellis duabus intus vol- 
ventibus, una ad columellam, una ad anfr. penultimum, instructa. 
Diam. 4, alt. 3 mill. 
8. HELIX DEPRESSIFORMIS, Pse. 
H. t. discoidea, planorboidea, supra planulata, subtus convexa, tenui, 
subpellucida, parum nitidula, fusco-cornea, late umbilicata, oblique 
confertim rugoso-striata; spira planulata, interdum parum elevata; 
anfr. iii. et dimidio, vix marginatis ; ultimo acute carinato, ad 
marginem compresso, ad umbilicum rotundatim carinato. 
Diam. 7, alt. 2 mill. 
9. HeLix PROSTRATA, Pse. 
Hi. ¢. tenui, depressa, profunde umbilicata, viridescenti-cornea, striis 
confertis subtilissimis decussata ; anfr.iv., planis, celeriter accres- 
centibus ; ultimo latiore, acute angulato, supra prope marginem 
sulcato, antice dilatato, subtus convexo ; apice depresso ; apertura 
late rotundato-lunari; perist. simplici, acuto. 
Diam. 6, alt. 23 mill. 
10. BuLtimus TuRGIDUS, Pse. 
B. t. globoso-ovata, tenuissima, pellucida, nitida, imperforata, inter. 
dum obsolete transversim crebristriata ; anfr. iv., conveais, ultimo 
turgido, ventricoso, trientes duos longitudinis teste superante ; 
spira brevi, apice obtuso; apertura ampla, abbreviatim ovata ; 
labro tenui, reflewo; pallide flavido-cornea, interdum rosaceo 
tincta. 
Long. 15, diam. 11 mill. 
11. Butimus arGcutus*, Pse. 
B. t. ovata, tenuissima, pellucida, membranacea, nitida, anguste um- 
bilicata ; anfr.iv., convexis, ultimo ventricoso, suturis impressis ; 
apertura ampla, ovata ; labro simplici, reflexo ; pallide stra- 
mined. 
Long. 13, diam. 8} mill. 
[* This species is regarded as a Partula by Mr. Cuming.] 
