Size large; ears moderate, ear from crown (taken in dry skin) 9 or 10
millimeters; eyes prominent; whiskers long and sensitive; fore feet
short and weak; hind feet long and powerful, provided with four
well-developed toes; tail very long, usually 30 to 40 per cent longer
than the body. Cranium triangular, the occiput forming the base and the
point of the nose the apex of the triangle, much flattened, auditory and
particularly mastoid bullae conspicuously inflated.