The symbol of this day, which is quite uniform in the day series of the codices, is shown in plate LXIV, 1.[207-1] In this the essential features appear to be the black spot at the top, the semicircle of dots around it, and the short perpendicular lines in the lower half. The form on the right slab of the "Palenque tablet," and also in the Lorillard City inscription, copied by Charney,[TN-1] is given in plate LXIV, 2. The only particular in which this differs from the other is that the little circle at the top is crosshatched. The form shown in LXIV, 3, is found in the Tikal inscription; it shows also the crosshatching in the little circle at the top. This character, however, when combined with other glyphs, and when used otherwise than as a day symbol, sometimes varies from the types given. For example, in the symbol of the month _Mac_ it is as shown in plate LXIV, 4. In this a minute, divided oblong, takes the place of the dark spot at the top, and a double curved line accompanies the circle of dots. Another form is shown in plate LXIV, 5. The only variation in this from the usual type is the introduction of two or three minute circles in the curved line of dots and the divided oblong. Dr Seler is inclined to believe that these are essential variants from the true _imix_ symbol; nevertheless, as _m_ is the chief consonant element both in _imix_, or _mox_ and _mac_, there appears to be a relation between the form of the glyphs and their phonetic value. Drs Seler and Schellhas believe _im_ to be the radical of _imix_ and _imox_, which are dialectal variations of the same word. Dr Brinton, however, basing his opinion on the fact that _mox_ and _moxin_ are used sometimes as equivalents, decides that the radical syllable is _m-x_. In this he is probably correct, and if so, this furnishes additional evidence of the close relation between form and sound, as in one case _m-x_ are the chief phonetic elements and in the other _m-c_. It is probable that Drs Schellhas and Seler were led to their conclusion by the fact that the symbol bears a close resemblance to the conventional form of the female breast, which in Maya is _im_. This, which was perhaps the origin of the symbol, was probably selected simply because _m_ is its only prominent element. Nevertheless, it is worthy of notice that the symbol for the day _Ix_ is frequently represented as shown in plate LXVI, 36, from Tro. 5*c. This is similar in some respects to the _Imix_ symbol, and the name contains the _i_ and _x_ of the latter. If the writing is phonetic, the points of resemblance may have some significance, otherwise they do not.