A HISTORY OF DURHAM 

 CYCLOSTOMES 



•*I25. Sea Lamprey. Petromyiuon marinus, *12J. Mud Lamprey or Pride. Pctromyzon 

 Linn. branchialh^ Linn. 



Not common. ^" streams. Recorded by Surtees for the 



Skerne. 



•126. River Lamprey. Petromyzon fluviatilis, 128. Hag. Myxine glutimsa.Unn. 



Locally, Sucker. 



In the rivers and streams. Abundant. 



^72, 



