Judging from the general application of this design, it is quite obvious that it is not primarily a feather design, but that it is a decorative element used throughout in certain definite positions for the purpose of filling in. Flat black curves are used quite often for indicating the teeth. These may be observed in fig. 269 _a_, on the body of fig. 270 _a_, in the lowest face in fig. 204, in the lower faces of fig. 271. * * * * * We have discussed before the adjustment of animal form to the decorative field. The adjustment is not by any means free, but definite, stylistic forms may be recognized. These appear with great clarity on the Chilkat blankets. The measurements of the blankets show that the central height is very nearly one half of the width. The width of the narrow border, consisting of a black and yellow stripe, is about one twelfth of the total width. The angle of the lower border is quite variable, the vertical distance from a line connecting the lower corners of the blanket to its greatest depth is generally a little less than one sixth of the width. The fundamental trait of the blanket pattern is the division of the field into three panels. The central one about double the width of the lateral ones, or more. In most blankets the line of division of these fields is quite clear and is indicated by black and white lines. The designs on the lateral fields are symmetrical and quite distinct from the central field. [Illustration: Fig. 267. Schematic design showing the arrangement of the central field of the Chilkat blanket.] [Illustration: Fig. 268. General plans of Tlingit blankets.] The blankets may be divided into two large groups. Their fundamental patterns are indicated schematically in fig. 267. The one design is clearly a representation of an animal with a large head which occupies the whole upper part of the field down to an almost straight cross line (fields 1, 2, 5, fig. 268). Under it are the body (field 3) and in the lower border the tail and hips (field 4) of the animal. It may be noticed that there are always two tail joints, although in other cases the use of a single tail joint for birds and a double tail joint for sea mammals is fairly consistent. Fields 6, 7, and 8 are used in various ways. They are not essential parts of the animal represented, although field 6 may be utilized for the purpose of showing parts of the back, and field 7 may be utilized for a representation of the fore arms. In this style we may distinguish, in the wide center, a central stripe, consisting of the elements numbered 6, 2, 3, 4 and two lateral stripes 5, 1, 7, and 8. Generally these sections interlock. In a few specimens, the outer limits of field 3 are carried down to the lower border so that they form a continuous broad line with the outer limits of field 4. [Illustration: Fig. 269. Chilkat blankets.]