308 



divergent fhej may he, most of them cannot be deemed incorrect, 

 wlien we bear in mind that they concern different stages. 



Rutherford's view of the very earlj ossi- 

 fication of cartilaginons cells is no donbt correct, 

 but liolds good only for young stadia. Neither 

 is tiie conception of Hertwig and Braus about 

 a separate centre of ossification quite incorrect, 

 since tiiere is a stage in wiiich an in- 

 dependent cartilage is forming bone.BAKDELEBKN's 

 record about an ossitication under and beside 

 tiie spina cannot altogether be disqualified 

 either, but it only applies to a brief stage of 

 development. However, ossification like that 

 of the bones of the cranial vault does not 

 occur in the development of the shoulder-blade. 

 In the neonatus a few cartilage may possibly 

 sometimes be found at the spina (Bhyce), but 

 it is certain that the spina scapulae in the 

 new-born child does not consist of cartilage. 

 Margo superior scapulae (Kolliker and Hehtwig advocate the opposite 



view). Lewis's conception, however, (doubling 

 of the margo superior) is altogether wrong. The diagram borrowed 

 from Lewis by Bhoman, Bryce and Bardeen represents a faulty recon- 

 struction of the shoulder-blade. 



Fig. 11. 

 Homo 90 m.m. 



