138 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



toxylin followed by eosin. I give, in the meantime, only 

 a provisional account of the structure of this growth. 



Fig. 5, PL III, represents a vertical section through 

 the outer part of the finely papillated portion of the 

 tumour : the little protuberances standing out above the 

 surface are the sections of these smaller papillae. Below 

 them the tissue consists largely of bundles of coarse 

 connective fibres running in every direction. Two series 

 of bundles do, however, assume prominence : (1) very 

 coarse fibres running nearly perpendicularly to the 

 surface of the tumour into the interior of the papillae, 

 and branching and apparently anastomosing freely; 

 (2) coarse fibres running approximately perpendicularly 

 to these in the deeper parts of the tumour. These also 

 branch, adhere together, and anastomose. In methyl- 

 blue-eosin all these coarse fibres stain at once a very 

 intense blue, and the same intense staining results from 

 treatment with Mallory's combination. When treated 

 with carbol-gentian the lower parts of the tumour (at 

 this particular place) give a very decided mucin reaction. 



Mingled with these coarse, intensely staining fibres 

 are finer ones, and these form a general stroma which 

 penetrates into the interiors of the papillae. Fig. 4, 

 PL III, represents part of the tissues within one of these 

 papillae, the external surface being to the left in the 

 figure. There is no evident epithelium on the surface of 

 the tumour, and no trace of epidermis, and one can only 

 see a kind of limiting membrane of very obscure 

 structure. The tissues within the papilla consist of a 

 fine areolar network with numerous nuclei, bundles of 

 coarser fibres, and some of the very coarse connective 

 tissue fibres from the lower parts — none of the latter is, 

 however, represented in the figure. The papilla is very 

 vascular, and sections of a capillary knot are shown : 



