SEA-FISHERIES LABORATORY. 391 



Two-thirds natural size. The ring at the 

 ventral extremity of axonost 1 indicates how 

 much of the latter protrudes freely from the 

 body wall in dead specimens. Cp. table in 

 text. 

 Fig. 19. Moist lateral dissection from the eyeless side of 

 the last seven caudal vertebrae and the pos- 

 terior extremities of the dorsal and anal fins 

 and their supports of a 52cm. Plaice. Natural 

 size. The sigmoid curve of fin ray 71 of the 

 dorsal fin and its horizontal position are 

 abnormalities. Cp. with fig. 14 and table 

 in text. 



Plate Y. 



Fig. 20. The viscera seen from the ocular side. Only 

 the body wall has been removed and the 

 muscles of the limb girdles dissected away. 

 The ovary and rectum are opened to shew 

 the external opening of the oviduct. The 

 specimen was a ripe female. Two-thirds 

 natural size. 



Fig. 21. The viscera seen from the ocular side. The 

 body wall and the superficial coils of the 

 intestine have been removed and the pectoral 

 girdle, operculum, sub-operculum and inter- 

 operculum dissected away. The lateral wall 

 of the pericardium has been removed. The 

 positions of haemal spine 1 and axonost 1 

 are indicated by broken lines. The speci- 

 men was a spent female. Two-thirds natural 

 size. 



