144 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Plate IV. 



Fig. 1. Epithelioma from a Turbot. Vertical section through 

 one of the wart-like protuberances on the skin of 

 the fish. The part diagrammatically shaded with 

 fine lines and dots is the new growth. Below this 

 is the broken subdermal coarse connective tissue 

 layer. Below this again is the body musculature. 

 Magnified about 25 dia. 



Fig. 2. Fibrosis of the liver in a Conger. The margin of a 

 fibrous nodule seen under an oil-immersion lens. 



Fig. 3. The same. Some cells from the altered hepatic 

 tissue round the fibrous nodule. 



Fig. 4. The same. A fibrous nodule cut meridianally. 

 Centrally is the new growth ; marginally the altered 

 hepatic tissue. Oil-immersion lens. 



Fig. 5. Benign tumour from the muscles of a Halibut. Details 

 of the structure of the fibroma as seen under an 

 oil-immersion lens. Fine reticulum of connective 

 tissue, with small rounded cells in the interspaces. 



Fig. 6. The same. Section through the margin of a tumour. 

 The dark stippled part to the left represents the 

 new growth. On the right are the surrounding 

 muscle fibres in oblique section. This tissue is 

 unaltered. Between these two layers is the con- 

 nective tissue capsule of the tumour. Magnified 

 about 40 dia. 



Plate V. 



Fibroma growing on the anterior margin of the orbit of a Cod. 

 About half natural size. 



