\ 

 THE POWAN, POLL AN, VENDACE, AND GRAYLLNG 283 



The PoIIan {Coregonus pollan) 



Teeth. 

 As in the powan. 



Fins. 

 First Dorsal : 13 or 14 rays. 

 Second Dorsal : Rayless, adipose. 

 Anal : 12 or 13 rays. 

 Ventral: 12 rays. 

 Pectoral: 15 or 16 rays. 

 Caudal : 23 rays. 



The polJan is found only in the lakes of Ireland, and 

 has been given distinct specific rank, although, from its close 

 similarity in appearance, habits, and quality of flesh to the 

 powan, or gwyniad, it requires close acquaintance with both 

 fish to explain the difi^erence between them. As I have never 

 seen specimens of either, except in museums, I can only 

 accept the conclusions to which skilled observers have come. 



The only particulars about pollan which I can find are 

 those given by Thompson in the Proceedings of the Zoological 

 Society for 1835. He described the abundance of this species 

 in Lough Neagh, and states that three or four draughts of 

 the net at the mouth of Six-mile Water produced 17,223 

 pollan, which were sold for j/^23 6j. %d. 



The Vendace [Coregonus vandesius) 



Teeth. 

 As in the powan. 



Fins. 

 First Dorsal : 1 1 rays. 

 Second Dorsal : Rayless, adipose. 

 Anal : 13 rays. 

 Ventral : it rays. 



Pennant was no doubt correct when he interpreted the 

 name " vendace " as representing the French vaudoise^ or 

 vandoise, a dace, for all the Coregoni are suggestive in appear- 

 ance of the Leucisci. The French origin of the name has 

 tended to strengthen the tradition, assuredly groundless, that 



