EXPLANATION OF THE PLATES. 205 



PLATE XXVI. 



-.flOfcO lo SilfiV 

 MUCOUS MEHBKAUE OF THE ALIMENTARY CAXAL, continued. 



FIG. I. Cul-de-sac of a compound cardiac gland. Its 



epithelial cells are larger than those of the simple and pyloric 

 glands, and possess a different shape. 



FIG. II. Mucous membrane of the duodenum mag- 

 nified 25 diam. 1, A conical villus ; 2, same, valvular in 

 shape ; 3, a compound valve-shaped villus ; 4, orifice of Lieber- 

 kuhn's glands. 



. FIG. III. Mucous membrane of the ileum magnified 

 25 diam. 1, A villus ; 2, orifice of Lieberkuhn's glands. 



FIG. IV. A villus covered by its epithelium magni- 

 fied 250 diam. 1, Cells seen with their bases presenting ; 2, 

 cells seen obliquely ; 3, amorphous coating. 



FIG. V. Epithelium seen on its superficial aspect 

 magnified 400 diam. 



FIG. VI. Cells seen in tjieir whole length ; their bases 



still covered by the amorphous investment. 1, A cell with two 



, . 

 nuclei. 



FIG. VII. A villus deprived of its epithelium. 1, Amor- 

 phous or slightly fibrillated substance ; 2, a vascular loop ; 

 3, nuclei, most of which seem to belong to capillary vessels. 



FIG. VIII. Villi, injected magnified 50 diam. 



FIG. IX. A Brunner's gland magnified 50 diam. 



FIG. X. A Lieberkuhn's gland magnified 125 diam. 

 1, Its wall; 2, its epithelium. 



FIG. XI. Orifice of a Lieberkuhn's gland magnified 125 

 diam. 1, Epithelium of the gland forming a radiating crown 

 around the central open space, 2. 



FIG. XII. A solitary gland of the ileum magnified 25 

 diam. 1, Projection of the gland; 2, villi; 3, orifices of Lie- 

 berkuhn's glands. 



FIG. XIII. Two solitary ductless glands injected mag- 

 nified 50 diam. 1, Radicles of the meseraic vein; 2, capillaries 

 urmounting the glands. 



