118 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Fig- 4- The same. Part of the section in an area of 

 necrosis. Matrix of cell debris. Spindle- 

 cells, oat-shaped cells, and spherical cells 

 lying loosely. Oil -immersion lens. Field B in 

 Text-fig. 4. 



Fig- 5. The same. Part of a nodnle lying loose in the 

 necrosed tissue of the tumour. "Giant-cell" 

 masses are surrounded by strong fibrous invest- 

 ments. Oil-immersion lens. 



Fig. 6. The same. Part of a section of the sarcoma in 

 the muscle tissue adjacent to the necrosed mass. 

 The figure shows the details of a capsule 

 surrounding a broken-down mass of sarco- 

 matous cells. The upper part of the section 

 represents almost completely broken-down 

 tumour cells. Oil-immersion lens. Field A 

 in Text-fig. 4. 



Fig- 7- The same degenerating muscle fibres in the 

 vicinity of the main tumour. Oil-immersion 

 lens. Field D in Text-fig. 4. 



Fig- 8. The same. Necrosed sarcomatous tissue in the 

 muscle tissue adjacent to the main tumour. 

 Oil-immersion lens. Field C in Text-fig. 4. 



Plate VII. 



Fig- 1- Haemangioma in a Stickleback. Transverse 

 section through the head of the fish in the region 

 of the eyes. The tumour is represented by the 

 darkly-stippled area round the eye on the left 

 of the figure. 



Fig- 2- Sarcoma in a Cod. Cell-elements found in a 

 smear made from the semi-liquid part of the 

 necrosed tumour. Oil-immersion lens. 



