. Dwellers of the sea and shore . FREE-SWIMMING LARV^ OF THE MOON SNAIL. (gRE.\TLY ENLARGED.) pelecypods; the other Is an example of the univalves, or gastropods. It Is to be noted, however, that the habits of the various species within each class may differ considerably. For Instance, not all pelecypods lead a stationary life; neither do all gastropods live by preying. The pelecypod mollusks are. In fact, a very extensive group of animals which vary widely even In their struc- ture. It is to this group that also belong the clam, the

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Keywords: ., bookcentury1900, bookpublishernewyorkt, booksubjectmarineanimals