EXPLANATION OF FIGURE XVITi 



[from Blaine's " outlines."] 



THE HEAD. 



A. The skull, face, and upper jaw, in one piece. 



B. Lower jaw. 

 a. Incisor teeth. 

 6. Tushes. 



c. jVIolares, or grinders. 



d. Peak formed by the extremities of the nasal bones. 



e. Zygomatic spine, to the bottom of which the masseter takes its origin. 

 /. Orlnt. 



g. Ca-\ity above the orbital arch. 



h. Pole. 



i. Zygomatic arch. 



j,j. Styloid processes for the attachment of the muscles. 



k. Joint formed by the upper and lower jaws. 



I. IMeatus auditorius, or opening to the internal ear. 



THE NECK. 



C. C. Marks the extent of the cervical vertebrae. 



D. Dentata. 

 m. Atlas. 



n. Wing of the atlas. 



0, Large superior spine of the dentata. 

 p. Body of the dentata. 



q. Inferior spine of the dentata. 



s, s, s, s, s. Superior spines of the five remaining cer-vical vertebrae. 



r, r, r, r, r. Oblique processes of the five last cer%ical vertebrae. 



u, u, u, u, it. Transverse processes of the same bones. 



t, t, t, t, t. Inferior spines of the five last cervical vetebrae. 



THE THORAX. 



V, V. Cariniform process of the sternum. 



w, w, w, to, w, w, w. Costae or true ribs. 



y> y> 2/' Z/' 2/» 2/> 2/' y^ yi y- ^'^^ as distinguished from the costse. 



X, X, X, X, X, X, X, X, X. Cartilages by means of which the ribs are attached to the sternum. 



z, z, z, z, z, z, z. Heads of the ribs. 



1, 1, 1, 1, 1. Superior spines of the first five dorsal vertebra, the fifth being generally the longest spine in the 



body. 



2, 2, 2, 2, 2, 2, 2, 2. Superior spines from the sixth to the thirteenth, towards which they slope downward; 



the thirteenth is generally the most upright spine in the dorsal region. 



3, 3, 3, 3, 3. Last five of the superior of the back spines, which have an inclination forward. 



THE LOIXS, OK LUMBAR REGIOX. 



4, 4, 4, 4, 4, 4. Superior spines of the liunbar region, thicker than the dorsal spines, and having a decided in- 



clination forward. 



5, 5, 5, 5. Projecting transverse processes of the loins, 



THE SACRUM. 



6, 6, 6, 6, 6. Superior spines of the sacrum leaning decidedly backward, thus lea\'ing a large space between the 



points of the last lumbar and the first sacral spine, at which place occurs the great hinge of the back. 

 8, 8, 8, 8. Bodies of the sacral vertebrae. 



7, 7, 7, 7, 7, 7, 7, 7, 7. Coccygeal bones. 



THE TAIL. 



THE PEL\^S. 



E. Ossa innominata, consisting of three bones upon each side. 



a. Ilium. 



h. Pubis. 



c. Ischium : the three bones unite at the cavity which receives the head of the thigh bone. 



9, 9. The inferior spines of the ilium. 



10. Superior spine, which partly covers the first sacral spine. 

 «•, c. Ischiatic spines. 



