EXPLANATION OF THE PLATES. 



PLATE LXV. 



Fig. 1. Mucous follicles of tongue, from under surface, clothed 

 with their epithelium. Magnified 27 diameters. 



Fig. 2. Ditto, with the epithelium removed, viewed as trans- 

 parent objects. Magnified 27 diameters. 



Fig. 3. Ditto, with the epithelium removed, viewed as opaque 

 objects. 27 diameters. 



Fig. 4. Filiform papillae, still invested with epithelium, from 

 the apex of the tongue near the tip. In this situ- 

 tion the filiform processes are almost entirely ab- 

 sent, and the cupped form of the papillae is well 

 seen. 27 diameters. 



Fig. 5. Mucous follicles and compound papillae, still invested 

 with epithelium, from the side of the tongue. Mag- 

 nified 20 diameters. These compound papillae ap- 

 proach the fungiform in structure. 



Fig. 6. A side view of two simple papillae of the tongue par- 

 tially invested with epithelium. 45 diameters. 



Fig. 7. Ditto of filiform papillae, with epithelium and epi- 

 thelial processes still adherent. 18 diameters. 



Fig. 8. The same viewed with a lens only. 



Fig. 9. Side view of compound papillae situated at the sides 

 of the tongue posteriorly to the caliciform papillae : 

 the simple papillae of which they are made up are 

 dilated at the extremities. 20 diameters. 



Fig. 10. Simple papillae from the under surface of the tongue. 

 Magnified 54 diameters. 



Fig. 11. Compound and simple papillae from the side of the 

 tongue, but posteriorly to the caliciform papillae. 

 Magnified 23 diameters. 



