412 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



EXPLANATION OF THE FIGURES 



(Plates xlv-xlix) 



Fig. i. Transverse section of the thorax at the interspace between the 3d and 



4th thoracic vertebrae. 

 Fig. 2. Transverse section of the thorax passing through the middle of the 



heart. 

 Fig. 3. Transverse section of the neck passing through a pair of transverse 



processes of a vertebra. 

 Fig. 4. Transverse section of the neck where the diverticula forming the su- 

 pramedullary canal are given off from the two canales intertrans- 

 versarii. 

 Fig. 5. Transverse section of the neck at a point where supravertebral diver- 

 ticula are given off from the canales intertransversarii. 

 Fig. 6. Dorsal aspect of the pelvis after the removal of the skin. 

 Fig. 7. Frontal aspect of the anterior diverticulum of the interclavicular sac 



and the adjacent parts. 

 Fig. 8. Ventral aspect of the posterior part of the left lung. 

 Fig. 9. Ventral aspect of the left lung. (Photographed with prism, therefore 



a reversed picture. X 2. 

 Fig. 10. Dorsal aspect of the left lung after removal of its superficial por- 

 tions. The lung has been injected with a dark-colored mass. A 

 number of bronchial branches have been exposed by the dissection. 

 (Photographed with prism, therefore a reversed picture.) X 2. 

 Fig. 11. View of the air-sacs that lie between the soft parts and the skeleton 



on the left side. 

 Fig. 12. Dorsal view of the air-sacs that lie between the soft parts and the 

 lungs. (The latter are represented as transparent.) 



AP Arteria pulmonalis. Fig. 9. 



BR Bronchus. Figs. 9, 10, and 12. 



C Costal impressions on the lung. Fig. 10. 



CF Caput femoris. Fig. 6. 



CI 1 Canalis intertransversarius, enlarged portion. Figs. 11 and 12. 



CI 2 Canalis intertransversarius. Figs. 3, 4, 5, 7, 11, and 12. 



CI 3 Canalis intertransversarius, anterior end. Figs. 11 and 12. 



CO Cavum orale. Fig. 12. 



COR Heart. Fig. 2. 



COS Rib. Figs. 2 and 5. 



CPRA Canalis praeacetabularis. Figs. 11 and 12. 



DA 1 Diverticulum axillare. Figs. 11 and 12. 



DA 2 Ventral outgrowth of same. Fig. 11. 



DC Diverticulum costale. Figs. 2 and n. 



DFA Diverticulum femorale anterius. Figs. 11 and 12. 



DFI Diverticulum femorale inferius. Figs. 11 and 12. 



DFP Diverticulum femorale posterius. Figs. 11 and 12. 



DFS Diverticulum femorale superius. Figs. 6, 11, and 12. 



