The length of the head of a full-grown well developed dog of correct size - measured with calipers - from the back of the occipital bone to the nostrils-should be from 7 to 7¼ inches, the bitch's head being proportionately shorter. Any measurement in excess of this usually indicates an oversized or long-backed specimen, although occasionally - so rarely as to partake of the nature of a freak - a Terrier of correct size may boast a head 7½ inches in length. In a well balanced head there should be little apparent difference in length between skull and foreface. If, however, the foreface is noticeably shorter, it amounts to a fault, the head looking weak and "unfinished." On the other hand, when the eyes are set too high up in the skull and too near the ears, it also amounts to a fault, the head being said to have a "foreign appearance." Keen of expression. Eyes should be dark in color, moderately small, rather deep-set, not prominent, and full of fire, life, and intelligence; as nearly as possible circular in shape, and not too far apart. Anything approaching a yellow eye is most objectionable. Ears should be small and V-shaped and of moderate thickness, the flaps neatly folded over and dropping forward close to the cheeks. The topline of the folded ear should be well above the level of the skull. A pendulous ear, hanging dead by the side of the head like a Hound's, is uncharacteristic of the Terrier, while an ear which is semierect is still more undesirable. Disqualifications - Ears prick, tulip or rose. The topline of the skull should be almost flat, sloping slightly and gradually decreasing in width toward the eyes, and should not exceed 3½ inches in diameter at the widest part - measuring with the calipers - in the full-grown dog of correct size, the bitch's skull being proportionately narrower. If this measurement is exceeded, the skull is termed "coarse," while a full-grown dog with a much narrower skull is termed "bitchy" in head. Although the foreface should gradually taper from eye to muzzle and should dip slightly at its juncture with the forehead, it should not "dish" or fall away quickly below the eyes, where it should be full and well made up, but relieved from "wedginess" by a little delicate chiseling. While well developed jaw bones, armed with a set of strong, white teeth, impart that appearance of strength to the foreface which is so desirable, an excessive bony or muscular development of the jaws is both unnecessary and unsightly, as it is partly responsible for the full and rounded contour of the cheeks to which the term "cheeky" is applied. Nose should be black. Disqualifications - Nose white, cherry or spotted to a considerable extent with either of these colors. Mouth - Both upper and lower jaws should be strong and muscular, the teeth as nearly as possible level and capable of closing together like a vise the lower canines locking in front of the upper and the points of the upper incisors slightly overlapping the lower. Disqualifications - Much undershot, or much overshot.