Some years ago, Dr. J. F. Snyder coined the term “bicave,” or “twice hollowed,” as applying to these. He contended that the term “discoidal” was meaningless. I have always adopted his new word, and those who have not liked it have not offered convincing reasons for disregarding the term. It is possible for Latin scholars to coin many concise words to describe certain objects, and these words would convey precise meaning. This is done in palæontology, geology, and all other branches of science, and there is no reason why it should not be followed in archæology. The arguments to the contrary savor of pedantry. Dr. Snyder’s term does not fit any other stone object, although Mr. McGuire, Professor Holmes, and others have all discussed these bicaves under the term “discoidals.” There are many flat, thin discs of both stone and clay found throughout the United States. These could not be called bicaves, because they are not twice hollowed. But they mark the beginning of that form. Of these discs, especially numerous in Tennessee, Kentucky, and Ohio and along the Ohio River, there are three kinds: simple discs, discs with slightly depressed centres, and ornamented discs. The bicaves themselves are alike in outline, having depressed centres. But there are great differences in the depressions. In the centre of Fig. 388 is a large disc of black slate around which is a well-defined rim. This form is rare. To the right of this specimen is a large quartzite bicave with a more extended rim. In Fig. 389 are four typical quartz and quartzite bicaves of general type. Certain specimens in Figs. 389 and 391 have a second small but prominent depression exactly in the centre. Usually about this depression is a little rim. Fig. 392 is a photogravure plate from the collection of Mr. F. P. Graves of Doe Run, Missouri. Here we have all of the discs and bicaves present. In the lower row is a large polished disc with flat base, which is not concave on either side. To the left of it, one in which the concavity is slightly marked. The others range from this type to those that are perforated through the centre. In Fig. 390, Colonel Young’s collection, there is a bicave of unusual form, being high instead of broad, with slight concavities, yet having the central depression clearly indicated. These have been called “chunky” stones by those who have written regarding the famous Southern game played by various Indians in the South and which has been described so frequently that I dismiss it with the statement that round discs similar to those illustrated in this chapter were rolled along the ground and a spear or lance shot after them, and the stone when it fell over on the side was supposed to be transfixed by one of these projectiles. Or, the nearness of a projectile to the hole in the stone counted in various ways. There is an early historical reference to this game cited in the Conclusions, Volume II. [Illustration: