258 
1.—Turt. D. p. 196. Somewhat oval, not much 
pointed; whorls four, the first occupying three-fourths 
of the shell, tumid in the middle, fulvous or dark pur- 
pie with eleven spiral circular shape ridges (often 
white or greenish black) which reflect a little upwards 
(the middle are the stronger) ; aperture dark purple or 
chocolate brown; lip thin, pillar broad, polished cho- 
colate. 0,37....0,25. Common. At the advice of an 
eminent Conchologist I have retained this shell as a 
species, although considered by Fleming, &c. as the 
young of Rudis, an opinion which 1 am inclined to 
assent to. 
L. Anatina. Gray Turt. p. 87.—Patupina A. 
Drap. Alder in Mag. Z. § Bot. 2. p. 116. Ovate, 
perforated, thin, transparent ; whorls ventricose, rounded 
and the mouth ovate ; operculum horny and brown. 
Resembles Bithinia (Paludina) Ventrtcosa, but is 
smaller and shorter and has a spiral and horny oper- 
culum ; the peristome is contiguous and the shell 
generally covered with green Alge. 
L.Saxatiuis Johnston in Berw. Tr. 3. p. 268.— 
Macg. Aberd, p. 138. Subglobose-conical, as broad 
as long, moderately thick, banded or tesselated with 
dusky brown or green; whorls three, transversely 
