204 ROBRIIT K. S. filM 



devoid of a superficial mucous portion. The cytoplasm stains 

 reddish with Mallory. Only a few invaginations represent the 

 primitive gland-tubes. 



At birth short simple gland-tubes are present. They are 

 lined by oxyntic and mucoid cells. Some of the latter are 

 wholly, others are only partially, mucoid, having a portion 

 of non-mucoid (red-staining with Mallory) cytoplasm within 

 the basal hiilf of the cell. The surface cells are similar to those 

 of the adult. 



One week after birth the glands are larger and the 

 oxyntic cells more prominent. Mucoid cells are present in 

 large numbers ; a few developing peptic (?) cells are visible. 

 These show no mucoid reaction ; they are coloured principally 

 by the red and brown dyes in Mallory's mixture. The pylorus 

 is now becoming defined ; it contains only mucoid cells. 



Three weeks after birth the peptic, nmcoivl, and 

 oxyntic cells are all plainly evident ; the appearance of the 

 mucous membrane now approximates that of the adult. 



Human. 



In a foetus of about four months the stomach is lined by 

 a mucous membrane of the simple type, l)earing only short 

 gland-tubes. These are forjned partly by jnucoid and partly 

 by red-staining non-mucoid cells ; oxyntic cells are as yet 

 absent. The junction between the stomach and the duodenum 

 is sharply marked off by the pyloric sphincter, but the mucous 

 membrane does not show a corresponding division. The 

 pyloric portion of the stomach for some distance from the 

 actual muscular junction contains both goblet and columnar 

 cells with striated borders. The glands are wholly mucoid. 



At birth peptic and oxyntic cells are fully developed : the 

 glands are much longer than at four months and altogether 

 more like the adult. 



Conclusions. 



It is quite clear that the gastric glands are in the first 

 instance formed of non-mucoid, red-staining cells. Later these 



