202 EXPLANATION OF PLATE. 



the network of fibrils is therefore brought into view. Prepara- 

 tion treated with Miiller's fluid, and then with mixture of chromic 

 acid and spirit ; see text. 



Fig. 12. — Isolated endotheliul plate of surface of mesentery. 

 The intracellular and intranuclear networks of fibrils are well 

 shown. 



PiQ. 13. — A capillary bloodvessel ; the two upper nuclei are 

 seen from their broad side, the two lower in profile. They all 

 show the network of fibrils. In the lower portion of the wall of 

 the vessel an imperfect network of fibrils may be perceived. 



Pio. 14, a and b. — Two unstriped muscle-fibres. The intra- 

 nuclear network of fibrils is well seen ; these are in connection 

 with fibrils of the substance of the muscle-fibre ; there are seen 

 numerous transverse markings along almost the whole length of 

 the muscle-fibre. That these transverse markings correspond to 

 rings which constitute the cortical part, i. e., the sheath, is well 

 shown in a. 



PiQ. 15. — A non-meduUated nerve-fibre of mesentery of newt ; 

 the nerve-fibre has a delicate sheath, the nuclei of which contain 

 a distinct network of fibrils. 



Pig. 16. — A connective tissue corpuscle seen sideways. The 

 nucleus contains a network of fibrils, in connection with that of 

 the cell-substance. 



Pigs. 17 and 18. — Two migratory cells ; 17, a common pale one, 

 18, a coarsely granular one. Their nuclei show the network of 

 fibrils very well. 



Pig. 19. — A caecal dilatation of a Ij'mphatic vessel of the same 

 membrane, showing the nuclei of the endothelial cells forming 

 the wall of the lymphatic, and also nuclei of lymph-corpuscles. 



Pig. 20, a and c. — Two connective tissue corpuscles ; the dis- 

 tinction between " ground-plate " and " fibrillar substance " is well 

 shown ; the " fibrillar substance " is in connection with the in- 

 tranuclear fibrils. 



b, a nucleated plate ensheathing a minute non-medullated nerve- 

 fibre. The intranuclear network is seen in connection with the 

 pi:ocesses and fibrils of the connective tissue corpuscle c. 



