THE NEWTS STOMACH DURING DIGESTION 42 1 



The lanthanin granules are very scanty, scattered through the nucleus and 

 pale blue in colour. 



The nucleoli are as a rule small and venons red in colour. A few may 

 be seen in process of extrusion. Cell division appears to hâve entirely ceased. 



The cells after recovery from their first exhaustion hâve again reached 

 at the end of the thirteenth hour a state bordering on complète exhaustion. 

 Near the pyloric end the cells are not so diminished in size and contain 

 more zymogen granules. The nuclei are less shrivelled and contain more 

 lanthanin granules which stain of a purplish grey colour. 



14 Hoitrs after food. — Plate II, fig. 21. 



The lumen is still wide but the cells are biggcr than in the last spéci- 

 men and contain more zymogen granules of médium and small size, they 

 stain somewhat feebly. The protoplasm is almost uncoloured. 



The nuclei are wrinkled. The chromatin is not abundant and the ka- 

 ryosomes are of small size, many being adhèrent to the nuclear wall, causing 

 it to appear thickened. The lanthanin granules are fairly abundant but do 

 not produce clouding of the nuclei. The nucleoli are also more nume- 

 rous and on the whole of larger size, some are being extruded. No cells 

 observed in process of division. 



Near the pyloric end the cells are small with fewer granules and the 

 lumen wide. The nuclei appear shrivelled, poor in chromatin and some 

 nucleoli are in process of extrusion. There is no mitosis visible. 



15 Hours after food. — Plate II, fig. 22. 



Lumen again smaller owing to increase in size of the cells which con- 

 tain without crowding numbers of zymogen granules of large size amongst 

 which those of médium and small size may also be seen. The protoplasm 

 stains of a very pale tint. 



The nuclei are still small and wrinkled measuring in an average 8,2 

 X 1 2,55 ^, they contain a moderate amount of chromatin which has a spread 

 eut watery look. The nuclear wall still appears thickened owing to some 

 chromatin being still spread out over its inner surface. The lanthanin gra- 

 nules are numerous of a dark slate grey colour, PlateIII, fig. 14. 



The nucleoli are often large and fairly abundant, they stain of the usual 

 venous red tint and some are being expelled from the nuclei. There appears 

 to be no mitosis in progress in the cells. 



Near the pyloric end the repair is less advanced though setting in. 



