152 
AMPULLARIA patula. — 
TAB. CCLXXXIV.—Two Middle Figures. 
Spec. Cuar. Ventricose, smooth, with a short 
spire; umbilicus large, open, lined with a 
spiral, adpressed, plate ; aperture obovate. 
Syn. Amp. patula. La Marck Env. de Paris, 148. 
Helix mutabilis. Brander, fig. 57. 
LLexern and breadth equal; the spire very short; the 
upper part of each whorl is sometimes a little depressed ; 
the umbilicus is large, and only very partially closed by 
the left edge of the mouth, from the lower part of which 
branches out a corrugated lamina, that is applied close 
to the surface, and forms a spiral lining to the umbilicus : 
the mouth obovate, net much longer than wide, other- 
ways resembling that of the last. 
This species was given me by Lady Burgoine: it 
does not appear to be so common as either of the others 
upon this plate. Her Ladyship picked it up at Barton. 
AMPULLARIA sigaretina. 
TAB. CCLXXXIV.---Two Lower Figures. 
Spec. Cuar. Ventricose, short, with a small acute 
spire, and sharp, longitudinal, striz ; umbili- 
cus covered, small, half filled by a spiral la- 
mina; aperture suborbicular, right lip en- 
Jarged. 
Syx. Ampullaria sigaretina. La Marck Env. de 
Paris, 148. 
Mone ventricose than the last, being wider than long, 
but with a more elevated spire: the mouth is sometimes 
even shorter than wide, in consequence of the right lip 
being greatly produced: the left lip is divided as in 
A. patula, and part of it ascends the umbilicus, which it 
nearly fills, but it only lines half of its surface; the 
other portion closes the umbilicus. The lines of growth 
are generally somewhat regularly elevated, forming 
rather distant, sharp striz, which seldom happens in the 
other species. 
Miss Salisbury and another Friend have sent this 
from Hampshire: it also occurs in the Bognor Rocks. 
tt does not appear to have been before observed as 
British, but it is as common near Paris as the preceding 
species are. 
