THE CYTOPLASM 



33 



phridial cells of leeches as shown in Fig. 14 (from a preparation by 

 Dr. Arnold Graf). The reticulum is here of great distinctness and 

 regularity, and scattered microsomes are found along its threads. It 

 appears with equal clearness, though in a somewhat different form, 



m mw 



Fig. 15. Spinal ganglion-cell of the frog. [VON LENHOSSEK.] 



The nucleus contains a single intensely chromatic nucleolus, and a paler linin-network with 

 rounded chromatin-granules. The cytoplasmic fibrillas are faintly shown passing out into the 

 nerve-process below. (They are figured as far more distinct by Flemming.) The dark cyto- 

 plasmic masses are the deeply staining " chromophilic granules" (Nissl) of unknown function. 

 (The centrosome, which lies near the centre of the cell, is shown in Fig. 7, C.) At the left, two 

 connective tissue-cells. 



in many eggs, where the meshes are rounded and often contain food- 

 matters or deutoplasm in the inter-spaces (Figs. 42, 43). In cartilage- 

 cells and connective tissue-cells, where the threads can be plainly seen 

 in life, the network is loose and open, and appears to consist of more 

 or less completely separate threads (Fig. 9). In the cells of colum- 



