152 
AMPULLARIA patula. 
TAB. CCLXXXI V.— Two Middle Figures, 
Spec. Char. Ventricose, smooth, with a short 
spire ; umbilicus large, open, lined with a 
spiral, adpressed, plate ; aperture obovate. 
Syn. Amp. patula. La Mar ck Env. de Paris, 148. 
Helix mutabilis. Brander , fig. 57. 
JLen&th 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, not 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. CCLXXXI V. — Two Lower Figures. 
Spec. Char. Ventricose, short, with a small acute 
spire, and sharp, longitudinal, striae ; urribili- 
cus covered, small, half filled by a spiral la- 
mina ; aperture suborbicular, right lip en- 
larged. 
Syn. Ampullaria sigaretina. La March Env . de 
Paris, 148. 
More 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 stria;, which seldom happens in the 
other species. 
Miss Salisbury and another Friend have sent this 
from Hampshire : it also occurs in the Bognor Rocks. 
It does not appear to have been before observed as 
British, but it is as common near Paris as the preceding 
species are. 
