128 THE ARTISTIC ANATOMY OF ANIMALS 



the result that it is only in very young individuals that we 

 can determine their presence. 



We find the skull to consist of an occipital bone, two 

 parietals, a frontal, etc. ; we will indicate but one detail in 

 connection with these bones : it is the presence of a single 

 condyle for the articulation of the occipital bone with the 

 atlas. We also note the quadrate bone, which is situated on 

 the lateral part of the cranium, is movable on this latter, 

 and acts as an intermediary between it, the bones of the face, 

 and the lower jaw. The quadrate bone is regarded as a 

 detached portion of the temporal ; on the signification of 

 this we do not now propose to dwell. 



A 3 



7 13 8 ^^ Cuyc,^ 



Fig. 65. — Skull of the Cock : Left Lateral Surface. 



I, Occipital bone ; 2, parietal bone ; 3, frontal bone ; 4, ethmoid bone ; 

 5, cavity of the tympanum ; 6, quadrate bone ; 7, superior maxillary 

 bone; 8, malar bone; 9, nasal bone; 10, 10, intermaxillary bone; 11, 

 nasal orifice ; 12, os unguis or lachrymal bone ; 13, inferior maxillary bone. 



On the anterior portion of the face we find the nasal bones, 

 which, articulating with the frontal on one side, circumscribe, 

 on the other, the posterior border of the nares. The nasal 

 bone of the one side is separated from that of the opposite by 

 the intermaxillary or premaxillary bone, which forms the 

 skeleton of the superior mandible. 



The superior maxillaries, which are rudimentary, are 

 situated on the lateral parts, and prolonged backward by an 

 osseous style which articulates with the quadrate bone ; 

 this styloid bone, the homologue of the malar, is designated 

 by certain authors as the jugal or quadrato-jugal bone. 



It is with the quadrate bone also that the inferior 

 maxillary articulates. 



