CHAPTER VII.—HERBIvorows SNAILS. 
A new-comer to our shores is the periwinkle, Litorina 
litorea Linn. Time was, and not many years ago, that this 
species was unknown south of Cape Cod. 
But during the last decade or two, the ery 
in the bivouacs of Litorina has been “ south- 
ward ho!” And flourishing colonies at 
Point Pleasant, Atlantic City and other 
points, attest the success of their crusade. 
Our friends across the “pond” eat boiled 
periwinkles. Thousand of bushels annually 
Fig. 37. Litorina litorea, are gathered for the London market. 
Another species of periwinkle, but this one a native Amer- 
ican, comes from the Gulf up to 
mid-Jersey, and sometimes even fur- 
ther north. It is Litorina irror- 
ata Say. It is narrower, more 
pointed than ZL. litorea, with a white =~ 
mouth and orange-brown columella. Sag 
It prefers salt grass to live in, and has an am- 
bition to climb to the very top of the grass. 
be 
Fig. 38. Litorina 4 : 3 : : + 
irrorata. Litorinella minuta Totten is the name of 
a tiny smooth shell somewhat related to the periwinkles. It 
has rounded whorls. — It is of a light yellowish-gray tint, but 
when the animal is dried in it is blackish. 
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