138 TECTIBRANCHIATA.—APLYSIADZ. 
membranous crop; a curved bag, which is generally 
found filled with pieces of coarse sea-weed. This 
large crop or paunch occupies the right side of the 
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INTERNAL ANATOMY OF SEA-HARE, 
body, and opens laterally into the middle stomach, 
which is the smallest of all, and performs the part 
of the gizzard. Its coats are thickened; and the 
