The craniology and relationships of four species of Bos II. Basic craniology: Bos taurus L. Proportions and angles

This paper is the second of a series on the craniology of four species of Bos. It is a further study of the skulls of British domestic cattle which are used in an attempt to establish a basic craniology for the genus. Part 1 (Grigson, 1974) dealt with nomenclature, material, history, age assessment and absolute size. This paper deals first with cranial proportions and then with cranial angles.The results show that the proportions of the skull depend on its size and, to a lesser extent, on its sex, cows having relatively narrow skulls, with short horncores, but sometimes longer horns than bulls. Cranial angles seem to be independent of size or sex, but are influenced slightly by age, and also, in some cases, strongly by breed.