Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 A ''Living FossiT 223 as were the hard coverings that prevailed among some of their contemporary creatures. One of those creatures was the trilobite. And, in- deed, its enduring remains are among the oldest of all undoubted and definite organisms found in the primor- dial rocks. The general form of the trilobite is not unlike that of the familiar terrestrial isopod crustacean called the 'sow bug.' After the manner of the sow bug it was able to roll itself up into a ball, and in this posi- tion its fossil has often been found
Dwellers of the sea and shore . dwellersofseasho00crow Year: 1935 A ''Living FossiT 223 as were the hard coverings that prevailed among some of their contemporary creatures. One of those creatures was the trilobite. And, in- deed, its enduring remains are among the oldest of all undoubted and definite organisms found in the primor- dial rocks. The general form of the trilobite is not unlike that of the familiar terrestrial isopod crustacean called the 'sow bug.' After the manner of the sow bug it was able to roll itself up into a ball, and in this posi- tion its fossil has often been found. Formerly the two were thought to be related, but, notwithstanding cer- tain of its crustacean characteristics, the trilobite has in recent years been classified with the Arachnida, a group including the spiders and scorpions. The truth
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