We have not limited ourselves entirely to the Maya manuscripts as we have drawn upon the vast amount of material available in the stone carvings, the stucco figures, and the frescoes found throughout the Maya area. This material has by no means been exhausted in the present paper. In addition to the figures from the Maya codices and a comparatively few from other sources in the Maya region, we have introduced for comparison in a number of cases figures from a few of the ancient manuscripts of the Nahuas and the Zapotecs to the north. The calendar of these two peoples is fundamentally the same as that of the Mayas. The year is made up in the same way being composed of eighteen months of twenty days each with five days additional at the end of the year. There is therefore a more or less close connection as regards subject matter in all the pre-Columbian codices of Mexico and Central America but the manner of presentation differs among the different peoples of this region. FOOTNOTES: [284-*] The first two parts of Dr. Seler's Treatise, "Die Tierbilder der mexikanischen und der Maya-Handschriften" published in the _Zeitschrift für Ethnologie_, Vol. 41, have appeared during the time when this paper was passing through the press. The most excellent and exhaustive treatment by Dr. Seler would seem to render the present paper unnecessary. It has seemed best, however, to continue with its publication inasmuch as its field is narrower and more space is devoted to the Maya side of the question to the exclusion of the Mexican. Dr. Seler, on the other hand, while by no means neglecting the Maya, has spent more time in explaining the Mexican figures. I SYNOPTIC CONSIDERATION OF THE MEANING AND OCCURRENCE OF ANIMAL FORMS Before taking up the different animals in the codices it may be well to consider some of the more common ways in which the figures occur and their connection with the surrounding figures. MANNER OF REPRESENTATION. The entire body of the animal may be represented realistically or the head alone may be shown. The animal head is frequently attached to a human body. The animal may appear conventionalized to a greater or less extent and the head in turn may change in the same way until only a single characteristic of the animal remains by which to identify it as, for example, the spots of the jaguar or the feathering around the eye of the macaw. In the case of the glyphs, a term employed to designate the regular and usually square characters appearing in lines or columns throughout the codices and inscriptions, we find both the realistic drawing and that where conventionalism has come in.