of the Fisher// Hoard for Scotland. 
interior cavity was found to be fully occupied by a hard reddish mass of 
very irregular form. The fibrous capsule formed an exact mould around 
the contained mass. The latter was composed of congealed blood, dense 
fibrous cartilage, and muscular tissue ; for the presence of which, amongst 
the abdominal viscera, it is difficult to account. 
Much reddish mucus occurred in the cavity of the tumour. Sections of 
the fibrous capsule showed that it was made up of a close mesh work of 
fibres, with interspaces occupied by round cells and granular matter 
PI. XVII, fig. 4). Its optical appearance was that of white fat, but no 
fatty globules appeared in it, and it was non-vascular. 
The capsule varied greatly in thickness, from £ an inch to over 1-J 
inches. The tumour was evidently a connective-tissue capsule formed 
around a foreign body in the "perivisceral cavity : this foreign mass, like a 
large fragment of undigested food, lying outside the walls of the alimentary 
canal. 
DESCRIPTION OF FIGURES. 
Plate XVII. 
Fig. 1. Melanotic tumour on haddock, slightly reduced sketch. 
Fig. 2. Section of melanotic tumour showing pigment-corpuscles. x 
about 400. 
Fig. 3. Section of melanotic tumour showing spindle-cells and blood 
vessels. Zeiss Oc. 2, Obj.. D. 
Fig. 4. Section of wall of internal tumour of cod. x 250. 
