But though a conscientious disciplinarian he was no lover of authority for mere authority's sake.

This I was forc'd to before I had executed half my Deſign, for the Machinery was entirely wanting to compleat it.

Critics may point out flaws in this story, which is casuistically vulnerable

Two leading types may be distinguished amongst the Graptolites, which are termed respectively monoprionidian and diprionidian. The monoprionidian Graptolites, such as Monograptiis priodon (fig. 54), are distinguished by the fact that the polypary, whether simple or branched, possesses but a single row of cellules or hydrothecæ. In the diprionidian forms, on the other hand, as in Diplograptus (fig. 63), the polypary possesses a row of cellules on each side.