74 PROCEEDINGS OF THE ANATOMICAL AND ANTHROPOLOGICAL 



Where the process runs into the mesial wall of the tooth gutter there 

 is no cartilage. The relations of Meckel's cartilage are well seen, and 

 it is to be noted that the origin of the mylo-hyoid muscle anteriorly is 



IV 





Fig. 14. Coronal sections of the right half of the lower jaw of a human foL'tus, 103 mm. in length 

 (x 8). I. is through the lateral incisor tooth germ; II. in front of canine tooth germ; III. 

 through first molar tooth germ ; IV. through posterior part of dental lamina ; V. through 

 coronoid process; VI. through condyle. Sy., symphysis; C., cartilaginous nucleus in inner 

 alveolar margin; N., inferior dental nerve; My., mylo hyoid muscle; L., lingual nerve; 

 Cr., coronoid cartilage; Cy., condylar cartilage; R., ramus; Zy., zygoma; P.E., external 

 pterygoid muscle; M.C., Meckel's cartilage. 



below the cartilage, while posteriorly it is above, and the mylo-hyoid 

 nerve sweeps round the outside of the cartilage. 



In a fii'lim 130 mm. in Icinjtli, the whole jaw has rapidly in- 

 creased in size. In this specimen there are two pairs of carti- 



