Plate II 



Fig. II. Vascular cluster on the Gen (arhythmic) soma. Unsectioned preparation 

 injected with a colloidal solution of Janus green. Thick dark-stained vessel sur- 

 rounding the soma and thin cluster of capillaries on the apex of the soma. > 60. 



Fig. 12. Section through a fixed, frozen, neutral red-stained preparation showing 



a giant cell, presumably the B soma. One sees a dark blue vessel here surrounding 



the apex of the soma. The maximum of basophilia is shown in the cytoplasm 



around the nucleus. 60. 



Fig. 13. Section through a fixed, frozen, thionin-stained medium-sized soma. 



This section shows the axon hillock area with the highest density of orange 



pigment and the very low basophilia of the emerging axon. ; 200. 



Fig. 14. Section through another medium-sized cell prepared as above but stained 



with methylene blue. One observes the pigmented layer of the periphery more 



developed at the right side. > 280. 



Fig. 1 5. Some pigmented granules or lipochondria distinguishable in the superficial 

 cytoplasm of a fresh nerve cell. These granules are unstained, their natural orange 

 pigment is due to the presence of two chromoproteids; a haemoglobin-like 

 pigment or haemoprotein and a carotenoid. Aggregates of visible granules are 

 in the centre of the micrograph. Beneath, one sees the nucleus of the cell. 280. 



Fig. 16. The same lipochondria after the effect of hypotonic saline (diluted sea 

 water). They swelled and started to coalesce. Such "haemolytic"-like effects are 

 observable also during the action of ether, chloroform or ethanol vapours. >: 280. 



Fig. 17. Section through two medium-sized nerve cells, fixed, frozen-sectioned and 

 stained with methylene blue. Between the two somata an axonic initial segment 

 of a large diameter is synaptically connected at least to the larger one, for 

 a relatively long distance. At their lower edge both cells are surrounded by a 

 sectioned capillary containing blood cells. x280. 



Fig. 18. Section through a giant soma, after formalin fixation, paraffin inclusion 

 and methylene blue staining. The close contact between a proximal satellite cell 

 (in the centre) and the giant soma, probably belongs to a somatic-synapse. The 

 absence of lipochondrial pigment is due to the alcohol-xylene treatment of the 

 paraffin sections. >: 200. 



