Gr. H. Drew 
199 
area normally supplied by the canals of the lateral line. Many of these 
new formed glands do not open superficially but are covered by the 
epithelium of the skin. The basal cells near the walls of the tubules 
also appear to resemble somewhat the type of columnar epithelium 
found in the mucous canals. On the other hand, Dr Lazarus Barlow 
points out that the abnormal cells contain a relatively large proportion 
of protoplasm for the size of their nuclei, and that the nuclear 
chromatin has a tendency to radiate from a central condensation to the 
periphery of the nucleus. The cells thus approximate nearer to an 
endotheliomatous type than an epitheliomatous. Also in these sections 
the abnormal cells in the cell masses seem to have a tendency to 
arrange themselves round a central lumen as though trying to reproduce 
the structure of a capillary or lymphatic. This condition is just 
noticeable but not well defined. 
A Myxo-fibroma originating in the Jaw of a Trout. 
Plate II. Fig. 3. 
A slow growing tumour was observed protruding from the lower 
jaw of a trout in the Duke of Bedford’s fish hatchery at Endsleigh. 
This slowly increased until it was of about the size of a large hen’s egg. 
Finally it sloughed otf, taking with it a portion of the jaw. 
The tumour was white and fibrous in appearance. 
Sections (Fig. 3) showed that the growth consisted of strands of 
white fibrous tissue between which were spaces traversed by delicate 
fibrils and containing stellate cells with oval nuclei. The section 
presented the typical appearance of a myxo-fibroma. 
The fish completely recovered after the sloughing of the growth. 
Pericarditis in a Turbot. 
A post mortem examination was made of a turbot which died in 
the Aquarium of the Marine Biological Association at Plymouth. The 
fish was probably about 15 years old. It was found that the peritoneal 
cavity was distended with fluid, the liver showed marked venous 
engorgement, the veins were everywhere distended, and the tissues were 
flabby and distended with fluid. The condition was typically that which 
would be produced by cardiac dropsy. 
The pericardial sac was enlarged to about eight times the size of that 
of a similar fish of approximately the same size and age. On opening the 
