POWAN AND GWYNIAD. 327 



along the side is more distinct in the grayling than in 

 the pollan. Thirdly, the pollan has not the pear or 

 lozenge-shaped eye of the grayling, nor the large and 

 very remarkable fin which distinguishes the grayling. 

 Both possess the adipose fin ; the grayling belongs to 

 the genus Sahno, the other to the Core<jonus. The pollan 

 does not take a bait." 



This fish is also found in Loughs Erne, Derg, and 

 Corrib. 



In the spring of the year pollan are often mistaken 

 for young salmon, and have been reported to Mr. 

 Walpole and myself as such. 



I am told they are found in most of the lakes of 

 Austria and Bavaria. 



POWAN. 



[Coregonus fera. Corerjonus acronius.) 



Local names: Freshicater Herring, German: Der Kilch, Das 

 Kropffelchen, Sandffelchen. French: La Gravenche. 



Tms fish is found in the Lake Constance and other 

 lakes of Southern Germany and Switzerland. 



It is also found in Loch Lomond, the fishery lasting 

 from March to September. They are considered best in 

 August and September. The consumption of these fish 

 is very local. 



THE GWYNIAD. 



(Sahno wartmanni. Coregonus dupe old cs.) 



German : Die Renke, Das Blaufelchen. French : La Lavaret. 



Swedish : Sik . 



This fish inhabits the lakes of Switzerland, Austria, 

 and Bavaria. 



In Land and Water, No. 13, April 21, 1866, is an 

 able paper by J. H. C. on the GAvyniad. 



