206 EXPLANATION OF THE PLATES. 



FIG. XIV. Mucous membrane of the colon, showing 

 orifices of Lieberkuhn's glands. 



FIG. XV. Mucous membrane of colon. 1, Lieberkuhn's 

 glands ; 2, orifice situated over the position of a solitary gland. 



SUPPLEMENTARY PLATES. 

 PLATE XXVII. 



FIG. I. Ossification in a medullary canal. 1, Newly 

 formed bone; 2, oval nuclei ; 3, nuclei with radiating processes; 

 4, line of junction of the blastema and bone. 



FIG. II. Transverse section of the orbicularis palpe- 

 brarum muscle. 



FIG. III. Meibomian gland. 1, Common excretory duct ; 

 2, lobules. Magnified 25 diam. 



FIG. IV. Kidney of guinea-pig. 1, Urinary tubule ; 2, its 

 terminal enlargement ; 3, Malpighian tuft ; 4, aiferent and effe- 

 rent vessels ; 5, epithelium covering surface of the tuft. Mag- 

 nified 240 diam. 



FIG. V. Transverse section of an eye-lash at its base. 

 1, Medullary substance; 2, cortical substance of the hair; 3, 

 internal epidermic layer of the hair follicle ; 4, external epider- 

 mic layer ; 5, internal zone of the derma of the hair follicle ; 

 6, external zone; 7, sebaceous glands. Magnified 220 diam. 



FIG. VI. An internal villus bare of epithelium, taken from 

 a portion of intestine during the progress of digestion. 1, Body 

 of the villus infiltrated with oil-globules ; 2, lacteal occupying 

 the central axis of the villus and ending by a closed extremity. 

 Magnified 220 diam. 



