A HISTORY OF DURHAM 

 CYCLOSTOMES 



**I25. Sea Lamprey. Petromyzon marinut, *12J. Mud Lamprey or Pride. Pttromyzon 

 Linn. branctlalii, Linn. 



Not common. , In strcams - Recorded by Surtees for the 



Skerne. 



126. River Lamprey. Pttromyzon fluviatiKs, I2 8. Hag. Myxine glutinoia, Linn. 



Locally, Sucker. 

 In the rivers and streams. Abundant. 





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