
MOLLUSCS, VERMES AND HYDROZOA 

A. depressa, Fig.-152, has a greenish-olive two inches long shell, with 
a series of ten to fifteen olive bands and yellow margins on the five smooth 
and polished whorls, which are more or less distinctly marked by lines 
of growth, a well defined suture and a depressed spire. The operculum 
is auriculate with the nucleus at the inner margin. The body is grey, 

FIG, 152. Ampullaria depressa. 
striated and dotted with black, the tenticles of the males yellowish-brown 
and of the females reddish or orange. It inhabits canals and ditches of 
soft muddy bottom and sluggish current in the middle Southern States, 
is Oviparous and lays 30 to 70 eggs on plants above the water level, which 
are soft when deposited but acquire a hard shell from exposure to the 
atmosphere. ‘They hatch in about 12 days and are the size of a large pea. 
A. miamiensis, Fig. 153, has a globose, yellowish-brown 2% inches 
long heavy shell with moderately impressed suture, a depressed spire and 
large body whorl. The aperture occupies about one-half the length ot 

FIG. 153. Ampullaria miamiensis, 
the shell, the operculum is calcarious and striated, with the nucleus at 
the upper side. This handsome snail occurs only in Southern freshwater, 
principally in Florida. Probably the largest native North American species 
is 4. pinei, from the same locality, which reaches a length of 3 to 3% inches. 
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