Dwellers of the sea and Dwellers of the sea and shore dwellersofseasho00crow Year: 1935 308 Dwellers of the Sea and Shore and are the products of very ancient animals called nummulites. Nummulites were protozoans, and they lived in the sea; the shells they secreted were coinlike in shape (hence the name). Internally these have a spiral cavity divided by partitions into numerous cham- bers. They seem to have no external opening, but the chambers communicate with each other by small per- forations. Now the nummulites became extinct a long time ago; so long ago, in fact, that the earth has since
Dwellers of the sea and Dwellers of the sea and shore dwellersofseasho00crow Year: 1935 308 Dwellers of the Sea and Shore and are the products of very ancient animals called nummulites. Nummulites were protozoans, and they lived in the sea; the shells they secreted were coinlike in shape (hence the name). Internally these have a spiral cavity divided by partitions into numerous cham- bers. They seem to have no external opening, but the chambers communicate with each other by small per- forations. Now the nummulites became extinct a long time ago; so long ago, in fact, that the earth has since NUMMULITES. been populated with other creatures, many of whom In their turn have died out too. So it will be seen that ages before the pyramids were built, perhaps before there was dry land where they now stand, these minute creatures were at work making the material out of which those structures were finally formed. It is by the fossils we find In the rocks, of course, that we know what lived in the ancient seas. We also have means of knowing what rocks are oldest; therefore, we are guided by the creatures they contain in forming an
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