RE AALE EEE ZENTREN OEL 
- We 
around the base of the last whorl within is a lamella, which 
slopes inwardly as it rises. 
Dimensions of two varieties: NO 1: greatest breadth .7 
inch.; least breadth .68 inch; height .7 inch. NP 2: greatest 
breadth .6 inch; least breadth .55 inch; height .7 inch.*) 
Helix torrefacta Chenin. ed. II H. Nr. 789 t. 126 f. 14. 
» » Reeve. Nr. 309. t. 62. 
Allg. Bem. Sowohl die Diagnose, als die von Pfeiffer 
eitirten Figuren entsprechen gut der Beschreibung von 
Adams. Hieher möchte ich die t. 62 f. 60 von Lister 
eitiren: ob Ferussac Tab. 51 B f. 4 auch nicht eher hieher 
gehöre, bleibt zweifelhaft. 
8. HELIX PILA Adams. 
Pfeiff. 1. c. Supp!. p. 140. Nr. 737 et in add. |. c. 
„Testa imperforata, subglobosa, tenuis levigata (sub lente minu- 
tissime deeussatula), diaphana, albida; spira convexo-coniea, aculius- 
cula; sutura profunda; anfı. 61/, convexi, ultimus globosus, basi non 
impressus; columella brevis, subverticalis, dent«alo-dilatala ; apertura 
lata, lunaris, lamina acute elevata infra medium anfractus ;‚ultimi par- 
tita; perist. simplex, acutum. Diam. maj. 12, min. 111/,, alt, fere 12 mill. 
Helix Pila Adams Contr. to Conch. Nr. 2 p. 31. 
(„Helix Pila. Shell very globular ; white, translucent ; with excessi- 
vely fine strie of growth and microseopie spiral lines; spire with 
very convex outlines, apex very obtuse; whorls more than 6, 
quite convex, with a well impressed suture; aperture lunate, 
except as interrupted by the intrusion obliquely of a large 
uneven abruptly lerminating columella ; lip very thin and sharp; 
within, nearly half way up the outer side, isa high lamella, 
which after entering half the length of the last whorl sud- 
denly diminishes to a line; umbilicus wanting. 
Greatest breadth .6 ineh; height .53 inch.) 
Obs. Hier wieder stimmt die Diagnose Pfeiffers nicht 
mit der Adams’schen Beschreibung überein; wir sind über- 
zeugt, dass Pfeiffer die ächte H. Foremaniana Adams mit 
der Helix Pila vermengt hat; oder noch eher vielleicht 
