SEA-FISHERIES LABORATORY. 



127 



6. Raia maculata with additional pectoral fin. 



A small Ray {Raia maculata) caught near Great Orme's 

 Head, in the Irish Sea, was sent to me in January, 1917, by 

 Mr. T. R. Bailey. The fish had a small, unpaired pectoral fin 



-ProfSterygium 



' Ep/'coraco/'d 



Mesopterygium 



Coracoid 

 -Postpterygium 



Fig. 9. Dissection of part of the shoulder girdle ol a ray to show an abnormal 

 extra fin skeleton. About half natural size. 



projecting out from the right hand side of the pectoral girdle 

 on the ventral surface. The lish was •_! I < ids. in breadth across 

 the wings, and had a notch on the righl pectoral I'm near the 



