While the stone collars of Puerto Rico are well known none has been reported of other materials. The writer, however, has in his collection a collar of shell in the shape of a slender stone collar. I t has been made out of the top portion of one of the so-called giant conch shells, so common in this island. The shell is of the same kind as those from which shell cups were constructed.

The specimen measures 7¼ inches in height and 5¼ inches in its greater width. Its thickness varies from 1 inch to nearly ¼ inch, being thicker at the junction of the shoulder and the decorated panel, where the arch is almost round. It is pear-shaped in its general outline, with the central opening, also of pear shape, surrounded by an almost flat band, an inch wide, which forms the shoulder and the decorated and undecorated panels above it (Fig. 53).