PLATE XXII. 
Fig. 
1. Paleeoniscus elegans, Sedgwick. a, Under surface of scales magnified. Marl-slate, 
Aycliff. Nat. Hist. Soc. of Northumberland, Durham, 
and Newcastle-on-Tyne. 
2. Palzeoniscus macropthalmus, Agassiz. Copied from Mr. Dinkel’s origmal drawing 
of Mr. Ripley’s specimen. 
3. Paleoniscus glaphyrus, Agassiz. Museum of the Yorkshire Philosophical Society. 
4. Palzoniscus glaphyrus ? or N. Species? 4, Under surface of scale magnified. 
Marl-slate, Whitley. Nat. Hist. Soc. of Northumber- 
land, Durham, and Newcastle-on-Tyne. 
