THE NEWTS STOMACH DURING DIGESTION 4I3 



in which they were kept for food, which they seized and dcvoured the 

 moment its was presented to them. 



A further proof, that the cells are now resting is that mitosis begins to 

 appear frequently in them. Many beautiful mitotic figures in ail stages are 

 présent in the oxyntic cells of préparations at this stage, showing that 

 Stintzing -^ was in error when he asserted that oxyntic cells never divide 

 by mitosis. 



Cell division goes on somewhat slowly in thèse animais and continues 

 to manifest itself even though no food be given even to the tenth day, but 

 with less and less energy. 



SECOND SET OF EXPERIMENTS. 



Newts fed a second time 114 hours after the first meal. 



1/^ Hour af 1er food. — Plate I, fig. 7. 



Différent acini vary considerably in appearance, some exhibit scarcely 

 any change, others again are considerably altered and présent a wide gland 

 lumen surrounded by cells diminished in size and containing fewer gra- 

 nules than in the résting condition. Thèse granules are mostly of large size 

 averaging 1,5 ;j- in diameter, near the apices ofthe cells smaller ones are 

 présent that do not stain so intensely as the others. The protoplasm stains 

 pale blue as does also the cell wall. 



The nuclei are irregular in shape and often dimpled, they measure on 

 an average 10,66 n X 14,03 v- which is about the same size as during rest. 

 The nuclear wall stains deeply blue owing to the chromatin adhering to 

 it; the remainder ofthe chromatin being gathered in large karyosomes of 

 spinous appearance and deep blue coloration, a few smaller karyosomes 

 are also présent. The chromatin is usually présent in fair amount. 



The lanthanin granules are not abundant and présent a blue grey co- 

 loration, Plate III, fig. 6. 



The nucleoli vary greatly in size, and stain of a deep venons red colour. 

 There is at least one large one in each nucleus averaging 3,3 t^ X 2,7 |j-, they 

 are oblong in shape and surrounded by a clear space, many lie close to the 

 nuclear envelope and some may be .seen escaping into the protoplasm. One 

 of thèse measured 5,56 \>. X 1,0 ij.. 



Many nuclei exhibit mitotic figures some probably surprised in the act 



