EXPLANATION OF PLATE VIL— Continued. 



4. Large spaces in the bone, filled with marrow, not indicated here. 



5. The connective tissue, or internal periosteum, between the two 

 lateral halves of the osseous nasal crest. 



6. Cavernous tissue, with large veins in transverse section, of the. 

 outer or lateral wall of the organ of Jacobson. 



, 7. Alveoli of the serous glands, cut in various directions. 



8. The ciliated epithelium lining the lateral wall. 



9. The sensory epithelium lining the median wall of the organ of 

 Jacobson. 



10. A large channel in the cartilage, containing nerve-bundles and 

 blood-vessels, in transverse section; the latter are the empty circles, 

 the former are filled with the nerve-fibres transversely cut. 



EiG. 3. — From a preparation similar to that drawn in Fig. 1, showing 

 part of the sensory epithelium of the median wall. Magnifying power 

 about 230. 



1. The epithelial cells. 



2. The sensory cells. 



3. The fibrous tissue forming the most superficial layer of the 

 mucosa. 



4:. A minute bundle of nerve-fibres. 



Fig. 4. — Part of the sensory epithelium, as seen with a high power, about 

 660. 



1. The epithelial cells. 



2. The sensory cells. 



3. The minute projections of both the epithelial and sensory cells. 



4. A point where the sensory cells reach very near to the surface. 



Fig. 5. — From a preparation similar to that drawn in Fig. 1, showing the 

 junction of the median and lateral wall of the organ of Jacobson. 



1. Part of the median wall. 



2. Part of the lateral wall. 



3. The duct of a serous gland. 



4. Venous blood-vessels in transverse section. 



5. The mucosa of the median wall. 



6. The alveoli of the serous glands. 



7. The boundary of the outer cartilage, not included in the drawing. 





