PLATE 6 



EXPLANATION OF FIGURES 



Photographs of sections passing through the stomach and intestines of a pouoh- 

 3^oung of the opossum. From pouch-young no. 1.56. 



16 Section 295. X 20. 



17 Limb 5 of the small intestine in section 195 (fig. 15). X 100. 



IS From limb 4 of the small intestine in section 295 (fig. 16). Some of the 

 cells of the villi are largel.y filled with a non-staining substance. A group of 

 darkly stained and smaller cells is also shown between the villi. X 400. 



19 Limb 7 of the small intestine in section 295 (fig. 16). The prominent 

 granular masses in the epithelial cells are here shown in a tangential section of 

 the villi. X 400. 



20 Villus from limb 1 of the small intestine in section 128 (fig. 14). X 400. 



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