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MESSRS. SCHAFER AND WILLIAMS ON THE [Jan. 18, 



pyloric fundus. This patch is distinguishable to the unaided eye 

 chiefly by its greater thickness, smoother surface, and by a slight 

 furrowed line which partly encloses it. It shows under the microscope 

 glands differing in character from those of the surrounding region, 

 and is therefore here described as a third region of the mucous mem- 

 brane. But this third region is not entirely confined to the circular 

 patch ; for a narrow tract of mucous membrane (n) containing similar 

 glands extends from the upper limit of the patch on either side to 

 meet its fellow above at the lesser curvature, thus completing an 

 irregular zone around this part of the stomach. 



In Macropus giganteus the epithelium of the first region (Diagram 

 2, A) has a much more limited distribution than in Dorcopsis. 

 The tract which it covers is widest in the neighbourhood of the 

 gullet, whence it passes over the front and back of the stomach. 

 Even here it does not extend as far down as the greater curvature ; 

 so that the two parts do not meet below. Moreover the left end of 

 the stomach, which terminates in a pouch-like projection (p), is not 

 lined by this epithelium, although a second smaller pouch (/>'), 

 directed upwards and situated nearer the gullet than the first one, 

 receives a lining from it. Both these pouch-like projections are 



Diagram 2. 



Stomach of Macropus giganteus. 



present also in Dorcopsis luctuosa ; but they are both lined with hard 

 epithelium like that of the rest of the cardiac fundus in this animal. 

 Anteriorly the hard epithelium gradually narrows in Macropus 

 giganteus until it becomes reduced to a mere strip along the lesser 

 curvature, and eventually ceases altogether about halfway between 

 the two extremities of the stomach. The ridges of mucous mem- 

 brane which extend towards the right from either side of the cardiac 



