126 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



tumour; aud here and there are places where the fibres 

 themselves are seen to be undergoing a kind of colloidal 

 degeneration. 



Over all the surface of the tumour the epidermis is 

 absent, and the superficial layers consist of coarse 

 connective tissue fibres. 



8. Lymphosarcoma producing Exophthalmos in a 

 Flounder {Pleiironectes flesus). 



The fish displaying this peculiar condition was sent 

 to me by Mr. T. E. Bailey. It had been caught in 

 Morecambe Bay, during August, 1911. It was a spent 

 female. 31 cms. in length, and in indifferent condition 

 with regard to nutrition. The pigmentation on the body 

 was normal, but the dorsal, ventral and tail fins were 

 almost white. The left eye was situated on the summit 

 of a protuberance about 21 mm. in height, and about 

 20 mm. in diameter at its base. Near the upper margin 

 this protuberance was very slightly constricted. It was 

 elliptical in section, measuring about 20 and 16 mm. in 

 its principal diameters. Seen from the ocular side of the 

 body, there was no trace of an eye, but on looking at the 

 protuberance from the blind side, the pupil could just be 

 distinguished. The cornea was nearly opaque, and 

 through it the lens could just be seen. On cutting 

 through the cornea it was seen that anterior and posterior 

 chambers had fused: the iris was quite broken down; 

 and the lens was lying loose among a mass of leucocytes 

 and blood corpuscles. The head of the fish is shewn, 

 two-thirds of its natural size, in fig. 6. The other 

 (right) eye was quite normal, and apart from the 

 exophthalmos, and flic ])e(uli:n' absence of colour on the 

 median fins, the fish was normal. 



Text-fig. 7 represents a dissection of the fish from 



