Dwellers of the sea and Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 Flozverlikt' Forms and Fantasies 167 fill but equally diverting is the lovely little urn sponge {Grantia cU'uita). This is a particularly favorable type in which to observe the way in which all these ani- mals work. If a specimen be placed in a dish of sea water, to which a trace of carmine is added, it will be seen that the coloring matter held in suspension is TUBE SPONGE. A NON-CALCAREOUS SPONGE. sucked through the sievelike pores on the creature's sides and expelled in a steady stream through the

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Dwellers of the sea and Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 Flozverlikt' Forms and Fantasies 167 fill but equally diverting is the lovely little urn sponge {Grantia cU'uita). This is a particularly favorable type in which to observe the way in which all these ani- mals work. If a specimen be placed in a dish of sea water, to which a trace of carmine is added, it will be seen that the coloring matter held in suspension is TUBE SPONGE. A NON-CALCAREOUS SPONGE. sucked through the sievelike pores on the creature's sides and expelled in a steady stream through the large opening that punctures the top. ^ I have referred to the sponges as animals; for that in truth is what they are. Aristotle was the first to find this out. So, you see, I am not setting forth a fact that is particularly new. Yet, in spite of the age-old knowl- edge of their identity, there is a prevailing impression

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