Note 19 — THE ASTEROLEPIS, ITS STRUCTURE, BULK, AND ASPECT.
Reading edition
In two of these, in a collection of several score, I have failed to detect the spiral markings, though their state of keeping is decidedly good. There are other appearances which lead me to suspect that the Asterolepis was not the only large fish of the Lower Old Red Sandstone; but my facts on the subject are too inconclusive to justify aught more than sedulous inquiry.