1889-90.] MORPHOLOGY AND PHYSIOLOGY OF THE CELL. 277 



cJiin, chromatin masses or bodies derived from chromatolysed nuclei. 



Pmeg, protoplasmic bodies loaded with eosinophilous granules like 

 zymogen, but insoluble in acetic acid. 



)ib, nebenkern. 



rc/ic, remains of chromatolysed nuclei and cells. 



£:£■, zymogen granules. 



Fig. I A resting pancreatic cell from. Diemyctylus; ill, a large irregu- 

 lar plasmosoma ; the chromatin is very abundant. Corrosive sublimate. 

 Haem., eosin. Xiooo. 



Fig. 2. Two resting pancreatic cells from the same preparation as the 

 last. In the right hand cell the elasticity of the fibrils of the degenerated 

 nebenkern has sprung out the cell wall. X looo. 



Fig. 3. From the active pancreas of Diemyctylus. Illustrates the 

 invagination by normal cells of cytolysed material. The cavity in the 

 centre occupied by the round mass, rchc, was probably the site of the cyto- 

 lysed cell, and from this the cytolysed products have passed to the sur- 

 rounding cells. The part represented occupied the centre of the section 

 and the meshes of the cytoplasmic network were filled with zymogen 

 granules which were dissolved out by the acid hardening reagents. It is 

 to be noted that the nuclei here are large and rich in chromatin. Flem- 

 ming's Fluid. Haem., eosin. Xiooo. 



Fig. 4. Taken from near the margin of a similarly prepared section 

 and therefore showing zymogen granules ; a, enlarged nuclei ; b, a 

 nucleus with a sickle-shaped element, half within and half without the 

 cell. Xiooo. 



Fig. 5. From the resting pancreas of Diemyctylus. The part drawn 

 was from near the margin of the section. In the centre of the illustration 

 is shown a cavity or intercellular space partially occupied by cytolysed 

 material and the chromatin derived from it is found in the adjacent cell 

 (cJnn), whose nucleus is greatly enlarged. The other nuclei are somewhat 

 irregular and rich in chromatin. Flemming's Fluid. Haem., eosin, safra- 

 nin. Xiooo. 



Fig. 6. From the central part of a section from the pancreas of. a 

 freshly captured specimen of Diemyctylus. Here also are shown free 

 intercellular masses, and in the adjacent cells spherules of chromatin and 

 cytoplasm ; a represents a single cell from the same preparation. Flem- 

 mings Fluid. Haem., eosin. Xiooo. 



Fig. 7. Three pancreatic cells from Diemyctylus. The formation of 

 zymogen has advanced somewhat, the chromatin is abundant and the 



