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Excerpt from Bulletin of the Museum of Comparative Zooelogy at Harvard College, in Cambridge, Vol. 28 This is plainly a case of solution in which the spines have survived the globate centre. It is a peculiar fact, also, that although much of the spicule has been dissolved, yet there has been no replacement by crystal line silica, but the surrounding amorphous Silica shows no trace of the original outlines of the dissolved portion. This may also explain the fact that the spicules (figs. 1 and 2) merge so gradually into the surrounding amorphous Silica that it is impossible to tell exactly where the spicule ends. It thus seems to occur frequently that the spicule is dissolved, and redeposited as amorphous Silica without definite form. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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