44 ON DENTAL EXOSTOSIS. 



Still nearer the fang we find the mass touglier, 

 and composed of fibrous tissue, but mingled with it 

 amorphous granules of a gelatinous appearance, and 

 in the meshes, and floating about the margins of the 

 mass, are a number of oval cells {vide Fig. 3, 

 Plate lY). 



At its junction with the fang the substance 

 becomes dense ; it is torn with difficulty, and under 

 pressure slips about between the two glasses, and 

 refuses to be flattened out. Under the microscope 

 it appears as a solid, amorphous, yellowish mass, 

 in which, however, may be still distinguished the 

 wavy appearance of the fibrous tissue (Fig. 4, 

 Plate IV). • . 



In this dense gelatinous substance osseous mat- 

 ter, which has been detached from the fang along 

 with it, may be seen ; not, however, shooting out 

 into it in the form of spiculse-like ossification in the 

 fibrous matrix of the bones of the skull, but as 

 rounded amorphous molecules. 



A more careful examination of the cells found 

 floating freely in the field of the microscope around 

 the margins of preparations made from the two last- 

 described modifications of the so-called coagulable 

 lymph, and which may also be distinguished im- 

 bedded in the masses themselves, shows them to be, 

 from their shape and size, identically the same 

 cells, but with different contents, and these contents 

 singularly agree with different modifications of 

 tissue above described. For instance, cells may be 



