48 BOOK OF SPECIES. 
whorls six, tumid, olive, with three reddish-brown 
bands ; sutures well defined. 14. B. T. 119. 
P. impuRA. Oval-oblong, yellowish horn- 
colour, smooth, pellucid ; whorls five; no um- 
inmacia. fe. IBS. T: 120. 
P. viripis. Somewhat conic and obtuse, 
pellucid, inflated, smooth, with four tumid volu- 
tions, and no umbilicus; light greenish. %. B. 
T. 122. 
AMPULLARIA. FLUVIATILE. 
Globular, ventricose; base umbilicated; left lp 
without a callosity; aperture oblong, entire ; 
margins united; outer lip acute, but not re- 
flected ; an operculum. 
A.reFFusA. Orbicular-ventricose, widely um- 
bilicate, smooth, white, with yellow and brown 
bands; spire exceedingly short; mouth orange; 
margins effuse; diam. 2}. W. 33. 73. 
A. AVELLANA. Sub-orbicular, flattened above, 
perforated, thickish, longitudinally wrinkled, yel- 
lowish brown; the last whorl angular above, sub- 
carinated ; spire acute, extremely short; diam. 2. 
W. 33. 46. 
A. FASCIATA. Ventricose, smooth, whitish, 
with bluish bands ; spire short, and obtuse; mouth 
reddish; diam. 132. W. 20. 7]. 
