THE POWAN, POLLAN, VENDACE, AND GRAYLING 283 
The Pollan (Coregonus pollan) 
FINs. TEETH. 
First Dorsal: 13 or 14 rays. As in the powan. 
Second Dorsal: Rayless, adipose. 
Anal: 12 or 13 rays. 
Ventral; 12 rays. 
Pectoral: 15 or 16 rays. 
Caudal ; 23 rays. 
The pollan 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 difference 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 £23 6s. 8d. 
The Vendace (Coregonus vandesius) 
FIns. TEETH. 
First Dorsal: 11 rays. As in the powan. 
Second Dorsal: Rayless, adipose. 
Anal: ¥3 rays. 
Ventral : 11 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 
