48 OSTEOLOGY. 



branches. Muscula'res, to tibialis anticus, extensor longns 

 digitorum, extensor proprius pcllicis. Exter'nal or tar > seus t 

 outwards across tarsus, supplies external brevis digitorum, 

 and articulations of tarsus and metatarsus; becomes gangli- 

 onic. Internal branch accompanies dorsalis peclis artery, 

 supplying ist interrosseous space and adjacent sides ist and 

 2d toes, communicates with internal division of musculo- 

 cutaneous. Mus'CUlo-CCta'aeua I supplies muscles of fibukr side 

 of leg and dorsal integument of loot (see poplitae'us exter'nus). 

 At lower 3d of leg (its front and outer side) divides into inter- 

 nal and external branches. Muscula'res, fibular muscles and 

 integuments. Internal branch, down in front of ankle to 

 supply inside of great toe and adjacent sides of 2d and 3d 

 toes, integument of inner ankle and inside of foot j communi- 

 cates with internal saphenous and anterior tibial. External 

 branch, down outer side dorsum of foot to supply adjacent 

 sides of 3d, 4th and 5th toes, integument of outer ankle and 

 outer side of foot ; communicates with external saphenous. 



OSTEOI^OOY. 



NOTE. Muscles in italics , are muscles of insertion. Fig- 

 ures in [ ] show the primary number of ossific centres, and 

 date of appearance of ossification. 



COMPOSITION: Gelatine and blood-vessels, 33.30; calcic' 

 phosphate, 51.04 ; calcic carbonate, 11.30 ; calcic fiouride, 2.00; 

 m?gncsic phosphate, x.i6; sodic chloride and oxide, 1.20; 

 total, 100.00. 



1H7M3EB: verteb'ral column (including sacrum and coccyx) 

 26; cranium, 8; ossiculi auu*tus, 6; face, 14; hyoid, sternum 

 and ribs, 26; upper extremity, 64; lower extremity, 60; total, 

 204. To this may be added the patellae and teeth, making a 

 grand total of 238. 



SPINS has 33 vertebrae, viz.: 7 cervical, 12 dorsal, slum- 

 bar, 5 sacral, 4 coccy^eul. They each have a body, 7 pro- 

 cesses, 2 pedicles, 2 laminae, 4 notches, and a foramen. The 

 Wrvical are noted for the smallness and broadness of body, 

 bifid spinous processes, bifid and perforated transverse pro- 

 cessses, etc. The peculiar are the ist, or atlas, which is like 

 a ' ' ring ;" the 2d, or axis, having a large (odontoid) process ; 

 the 7th, or fromincns, having a long spinous process. The 

 dorsal have body largest antero-posteriorly, spinous processes 

 directed downwards, facets for ribs. Peculiar are the ist, 

 having one whole facet, the rest demi-facets for the ribs ; icM, 

 \\th and iz/A, each having a distinct facet for a rib. tiiusclcs: 



