PLATE XXII. 



Fig. 



1 . Palaeoniscus elegans, Sedgwick, a, Under surface of scales magnified. Marl-slate, 



AyclifF. Nat. Hist. Soc. of Northumberland, Durham^ 

 and Newcastle-on-Tyne. 



2. Palaeoniscus macropthalmus, Agassiz. Copied from Mr. Dinkel's original drawing 



of Mr. Ripley's specimen. 



3. Palaeoniscus glaphyrus, Agassiz. Museum of the Yorkshire Philosophical Society. 



4. Palaeoniscus glaphyrus ? or N. Species ? 3, Under surface of scale magnified. 



Marl-slate, Whitley. Nat. Hist. Soc. of Northumber- 

 land, Durham, and Newcastle-on-Tyne. 



