909 



5883. The bones of the skull of a Child of seven years of age, with the milk teeth 

 and first permanent molars in place. 



The elements of the neural arch of the occipital vertebrae (i-s) hare coalesced, forming the 

 ' occipital bone ' of Anthropotomy. The neurapophyses (e) of the parietal vertebra have 

 coalesced with the centrum (s), and the union of this with the centrum (9) and neurapo- 

 physis (10) of the frontal vertebra, as also with the pterygoid appendages (M) of the maxillary 

 arch, constitutes the complex ' sphenoid bone ' of Authropotomy. 



The t\vo moieties of the bifid spine (7) of the parietal vertebra still continue distinct. The 

 moieties of the frontal spine (11) have coalesced. 



The body of the nasal vertebra (13) remains distinct, and constitutes the ' vomer ' of An- 

 thropotomy. The neurapophyses (14) have coalesced with each other and with part of the 

 capsules of the organ of smell, forming the ' sethmoid bone.' The moieties of the bifid spine 

 (is) continue distinct and form the 'nasal bones.' 



The germs of the second series of teeth are exposed in their formative alveoli, with the 

 exception of the last true molars, which have not begun to be calcified. The symbol attached 

 to each tooth indicates its homology according to the Table of the typical dentition in the 

 TABLE OF SYNONYMS. The distal element of the diverging appendage of the maxillary 

 arch (27), the diapophysis of the parietal vertebra (s), the pleurapophysis of the frontal ver- 

 tebra (M), and the osseous capsule of the organ of hearing (ie), have coalesced to constitute 

 the complex 'temporal bone' of Anthropotomy, minus the pleurapophyses of the parietal 

 vertebra, which have not yet become anchylosed as the ' styloid processes ' of that bone. 



Purchased. 



5884. The neural arches of the three posterior cranial vertebrae. 



The sutures between the centrum (i) and neurapophyses (i) of the occipital vertebrae are 

 still retained ; but the spine (3) has coalesced with its neurapophyses. The neurapophyses 

 (e & to) of the parietal and frontal vertebrae have coalesced with their respective centrums 

 (s & 9), which are likewise confluent : the moieties of the originally bifid spine (11) of the 

 frontal have coalesced together. 



In this specimen is shown the vacuity between the occipital (s) and parietal (a) neurapo- 

 physes, which is closed by the intercalated capsule of the organ of hearing (10), together with 

 the diapophysis (s) of the parietal vertebra, and the squamous appendage (?) of the max- 

 illary arch. The peculiarly developed brain of Man requires these accessory parts, even in a 

 greater degree than those mammalia which most resemble Man in the size of the cerebrum. 



Presented by Prof. Owen, F.R.S. 



5885. The bones of the adult skull separated and artificially connected together. 



They are numbered on coloured labels according to the TABLE OF SYNONYMS. The 

 additional confluence, which tends further to mask the common vertebral pattern in the 

 Human skull at this period of life, is that which attaches the pleurapophyses (ss) of the 

 parietal vertebra to the acoustic or petrosal capsule (ie), and adds an additional feature of 

 complexity to the temporal bone, by giving it the so-called ' styloid processes.' 



Purchased. 



