design consisted of a series of geometric lines, interlocking at extremities but not joining. This figure is one of the simple forms of a characteristic decorative motive widespread over the whole pueblo area. In its simplest expression it appears as two crescents, turned in opposite directions, with two horns adjacent. As such it is painted on the breasts of certain Katcinas, on shields, or cut in pictographs. But it is in decoration of pottery that this simple form reaches its highest modification and complication, and it is remarkable how many complex figures of geometric shapes can be reduced to this simple type. The horns of the two crescents may elongate and develop into square frets or spiral extensions, and these in turn be continued into triangular appendages, dentate or serrate margins. They may become terraced figures, their edges so closely approximated as to be separated by zigzag intervals, which in all cases are but the space left by the break. With all these modifications, no matter how complicated, the motive can be reduced to the two horns of adjacent crescents opening toward each other but not joining. This break is comparable to a peculiarity in encircling bands drawn on pueblo pottery, called the broken lines or "lines of life." Consider such a line about a vase, bowl, or jar to be broken at several points, or, as I have found in several instances, a noncontinuous band with three breaks and the ends so extended as to overlap the intervals either above or below; modify the extremities thus extended into terraced figures, spirals, or frets, and we have some of the developments of this most characteristic of all motives in the geometric designs of decorated pueblo pottery. This broken line, with its modifications, is found to have been used universally by pueblo potters, ancient and modern, accolents of cliffs or caves, wherever pueblo culture can be detected. The incisions on the armlet are simply modifications of the same motive.

Bracelets made of this shell are smaller, slighter, as a rule less carefully worked, and more abundant than armlets. The majority are perforated at the umbo, but the valves are so ground down that there remains no space for the heart-shape elevation; indeed, the thickness of the shell would not admit of it. Like the armlets, they were sometimes found free in the graves, as if cast there as a votive offering, but there can be no doubt that they were bracelets, for in more than one instance I have taken

the radius and ulna from the grave with these rings upon them. In one grave at Chaves Pass I found nine of these bracelets on the left arm of a single skeleton. It may also be mentioned that I have also found the armlets on the humerus, leaving no possible doubt as to their use.

Finger rings were made of still smaller specimens of this shell by grinding them in the same way. These, as a rule, were not finely made, but were invariably perforated at the umbo, possibly on account of the thinness of the shell at that point. They seem to have been worn on all fingers, and I have taken two from the same digit.

In the manufacture of armlets, bracelets, and finger rings the middle of the shell is ground almost to its edge, but very fine examples of Pectunculus were found where this had not gone so far. In these specimens (plate IX, figure 5) the shell was perforated by a circular hole one-half its diameter. The use of these shells, which were commonly found in pairs, is not wholly clear to me. In some cases they were taken from near the wrists of the dead. Although as a general thing their surface was rough, due to decay, a specimen from Homolobi was found to be as smoothly polished as when in use, showing incised lines extending from the perforation to the margin.

One of the most striking forms of Pectunculus was of small size, the surface cut in such a way as to resemble a frog (plate IX, figure 4). The hind and fore legs were well outlined, and the head, with two beveled holes for eyes, was situated at the umbo. As if to indicate that this object was a pendant, there was a hole for suspension at the umbo. The beveled perforations suggest sockets for eyes probably made of spherical stones. Shells carved in imitation of frogs, identical with this, have been taken from the ruins in the Gila valley.

We collected from the Chevlon ruins several specimens of Pectunculus which were found to be smeared with a tenacious pitch-like substance. The surface of this covering showed in places rectangular depressions, and the margin of the shell had been more or less changed by grinding. Their general appearance led me to suspect that they were formerly incrusted, a suspicion which was later verified.

During the excavations at Chaves Pass we found on the breastbone of a skeleton, several feet below the surface of the ground,

a beautiful specimen (plate VIII) of this shell with an incrustation of turquois mosaic set in gum or pitch. This is one of the finest specimens of aboriginal mosaic which I have ever seen. The minute pieces of turquois of which it was made were accurately squared and perfectly fitted, their edges being beveled in such a way that the gum in which they were inlaid was invisible between them. The only stone besides turquois used in its construction was a rectangular fragment of red jasper set in the middle of the mosaic. Retracted legs were represented by lines of smaller turquois and were separated from the remaining mosaic by dark lines of the gum in which they were imbedded. Although no eyes were indicated, the resemblances of this work to a frog fetish is too close to overlook, especially when compared with the shell frog mentioned above.

This beautiful object was taken out of the grave in the presence of Dr Walter Hough, and was seen by me a short time after. The workman who opened the grave was Mr J. Bargeman, of Winslow, Arizona, overseer of Mexicans employed by me at the ruin. It was broken when found, but no "restoration" was made except to glue on the shell the larger fragments of mosaic, fitting them back in their former position. The anterior part was not broken, and the turquois blocks are in the same position as when found. None had fallen out with the exception of a few near the posterior end. The fragment of red jasper in the middle of the back had become detached and was replaced. Although I have several small fragments which belong to the specimen, I have not replaced them for fear of error, and as far as human care can go the specimen is essentially the same as when found.

So far as I know, this is the only known specimen of a Pectunculus with turquois incrustations resembling a frog which has been found on the drainage of the Little Colorado river. Specimens from the Gila-Salado ruins have been reported, and of these I know of but one of ancient manufacture, the specimen which was formerly in the possession of Mr Lincoln Fowler, of Phoenix, Arizona. This object I have never examined, and as no published figures of it have, to my knowledge, appeared, comparisons with it are impossible.

The art of incrusting stone mosaic by inlaying was common in ancient Tusayan pueblos, and wood, lignite, bone, and shell were