234 
insertionem vix patente. — Diam. maj. 11, min. 9'/,, alt. 
5 mill. 
Hab. ad fluvium Amazonum superiorem. (Bates.) 
53la.. Helix Turnerı Pfr. 
T. anguste et clause umbilicata, depressa, subdiscoidea, 
tenuiuscula, conferte plicato-costata, diaphana, nitidula, cor- 
neo-lutescens, rufo-variegata et ad suturam distinete macu- 
lata; spira vix elevata; sutura denticulata; anfr. 4 con- 
vexiusculi, regulariter accrescentes, ultimus subdepressus, 
non descendens, loco umbilici lamina vitrea obtectus; aper- 
tura fere diagonalis, subtriangulari-lunaris; perist. simplex, 
rectum, marginibus distantibus, supero antrorsum arcuato, 
basalı medio denticulo albo munito, ad insertionem sub- 
dilatato. — Diam. maj. 7!/,, min. 61/,, alt. 3 mill. 
Hab. in Nova Caledonia. 
694a. Helix liratula Pfr. 
T. umbilieata, trochiformis, tenuiuscula, striata et liris 
filiformibus subconfertis cineta, diaphana, oleoso - micans, 
pallide corneo-lutescens; spira conica, apice obtusa; sutura 
impressa; anfr. 7!/, convexiusculi, ultimus angulatus, non 
descendens, basi laevior, convexior; apertura vix obliqua, 
subangulato-lunaris; perist. simplex, rectum, margine colu- 
melları deelivi, juxta umbilicum perangustum subdilatato, — 
Diam. maj. 6, min. 51/,, alt. 4 mill. 
Hab. in insula Ceylon. (Thwaites,) 
725a. Helix Gassiesi Pfr, 
T. umbilicata, discoidea, carinata, tenuius, arcuato- 
striata et lineis impressis obliquis sub lente decussatula, 
nitida, lutescens, flammis crebris castaneis fulgurata; spira 
immersa; anfr. 4 convexiusculi, rapide accrescentes, ultimus 
magnus, utrinque convexior, medio subacute carinatus; 
apertura obliqua, subtriangulari-lunaris; perist. simplex, 
acutum, marginibus conniventibus. — Diam. maj. 81/,, min. 
7l/,, alt. 3 mill. 
Hab. in insula Erromanga, Nov. Hebrid. (Turner.) 
