128 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



snout. This is not a very rare abnormality ; sometimes this 

 notch is very deep, and sometimes it is paired, but more often 

 it is unpaired. It indicates incomplete fusion of the pectoral 

 fin with the anterior region of the trunk. 



This interesting specimen is shown in Fig. 9. The ventral 

 side is represented and the skeleton of the shoulder girdle and 

 right pectoral fins is dissected out. The additional fin is 

 shown : it is about 5 to 6 cms. in length, and in form very 

 similar to the paired pectoral fin of a dog-fish. The coracoid 

 is separated from the epicoracoid by an open suture without 

 any ligament. The coracoid itself, and the pterygial skeletal 

 elements are quite normal, except that there is a little lateral 

 and ventral facet on the part where coracoid and epicoracoid 

 meet. Articulating with this is a small roughly triangular 

 cartilage (I in Fig. 9), and articulating with this again is a 

 pterygial cartilage (II in Fig. 9). This extends along the 

 anterior border of the additional fin, and to it are articulated 

 a series of soft and very irregularly shaped radial elements. 

 The remainder of the fin is soft and fleshy, very much resembling 

 the adipose dorsal fin of Salmonoid fishes. 



7. Sarcomatous tumours on the head of a Conger. 



In 1916, Mr. T. A. Coward, of the Manchester Museum, 

 sent me the head of a small Conger eel which had been seized 

 and condemned in the local fish market. On the top and left 

 side of the head was a large, hard tumour, nearly globular in 

 shape and about 10 cms. in diameter. The Figures 10 and 11 

 represent the appearance of the head as seen from in front and 

 from the left hand side. 



The growth was firm and there was no necrosis in its 

 interior parts. Over its surface the skin was rather darker 

 than elsewhere, and there were irregular blotches of dark 



