ANATOMY. 



stances of anatomical structure, which are 

 peculiar to the foetus, will be given under 

 the article FIETUS. 



EXPLANATION OF THE ANATOMICAL PLATES. 



PLATE I. 



Pig. 1. JL front view of the skeleton. 



1. The cranium. 



2. Os frontis. 



3. 3. The orbits. 



4. Upper jaw-bone. 



5. Teeth. 



6. Lower jaw-bone. 



7. The seven true ribs. 



8. The five false ribs. 



9. First bone of the sternum. 



10. Second bone of the sternum. 



11. Ensiform cartilage. 



12. The five lumbar vertebrae. 



13. Ilium, or haunch-bone. 



14. Os ischii. 



15. Os pubis. 



16. Os sacrum, or bone of the rump. 



17. Symphisis pubis. 



18. Thigh-bone. 



19. Head of the thigh-bone. 



20. Trochanter major. 



21. Patella, or knee-pan. 



22. 23. External and internal condyles 

 of the thigh. 



24. Tibia. 



25. Fibula. 



26. Bones of the tarsus. 



27. Bones of the metatarsus. 



28. Bones of the toes. 



a. The clavicle, or collar-bone. 



b. Scapula, or shoulder-blade. 



c. Humerus, or bone of the arm. 



d. Ulna. 



e. Radius. 



f. First row or phalanx of carpal bones. 

 ]. Second row or phalanx of carpal 



bones. 



h. Bones of the metacarpus. 



z. First phalanges of the fingers. 



k. Second phalanges of the fingers. 



I. Third phalanges. 



m. Three phalanges of the thumb. 



Fig. 2. View of the right ventricle and pul- 

 monary artery laid open. 



These parts are marked A a in Plate 

 VI. Fig. 1. 



a. A triangular flap of the fleshy side 

 of the ventricle, turned back, to expose 

 the cavity. 



b. Columns carnese of the heart. 



c. Tricuspidal valve. 



rf. The three semilunar valves in the 



mouth of the pulmonary artery, which is 

 slit open. 



e, e. Cut edges of the ventricle. 



Fig. 3. Vie~M of the cavity of the left ventri- 

 cle, and mouth of the aorta. 



n. a. Cut edges of the ventricle. 



b. Columnae earner. 



c. Chordae tending. 



d. Mitral valve. 



e. Semilunar valves of the aorta. 



PLATE II. 



Fig. 1. Back view of the skeleton. 



1. 2. Ossa parietalia. 



3. Os occipitis. 



4. Os temporis. 



5. Mastoid process of the temporal 

 bone. 



6. The seven cervical vertebrae. 



7. The twelve dorsal vertebrae. 



8. The five lumbar vertebrae. 



11. Os sacrum, or rump-bone. 



12. Os coccygis, or crupper-bone. 



13. Ilium. 



9. Ischium. 



14. Neck of the thigh-bone. 



15. Trochanter major. 



16. Trochanter minor. 



17. Condyles of the thigh. 



18. Malleolus externus. 



19. Malleolus internus. 

 '20. Oscalcis. 



tympanum of the ear. 



1. Malleus. 



2. Incus. 



3. Os orbiculare. 



4. Stapes. 



Fig. 3. JL view of the same bones, as joinedto 

 each other, and as connected to the mem- 

 brana tympani. 



c. Membrana tympani with the handle 

 of the malleus connected. 

 f. Head of the malleus joined to 

 -, which is the body of the incus. 

 h. Base of the stapes. 



Fig. 4. Jlvietu of the labyrinth of the ear. 



a. Three semicircular canals unopened. 



b. Section of the cochlea. 



c. Auditory nerve. 



d. Branches of the nerve going to the 

 vestibulum and semicircular canals. 



e. Trunk of the nerve most beautifully 



