112 E. T. Neivton — Vertehrata of the Forest-Bed Series. 



IV. — Notes on the Vertebuata of the Pre-Glacial Forest 



Bed Series of the East of England. 



By E. T. JSTewton, F.G.S. 



(Published by permission of the Director- General of the Geological Survey.) 



PAET VII.— PISCES. (Conclusion.) 



THE occurrence of Fish-remains among the " Forest Bed " Yerte- 

 brata attracted the attention of some of the earlier writers on 

 Norfolk Geology ; but it is only within the last few years that any 

 of these fish have been specifically determined. Mr. A. Bell in the 

 Proceed, of the Geol. Assoc. 1871, included the Fike and Perch in 

 his list of " Forest Bed " Vertebrata, and the same two species are 

 given by Mr. A. Savin in the Proceed, of the Norwich Geol. Soc. 

 for 1878, p. 27. The fish mentioned by Sir C. Lyell from Mundesley 

 (Lond, and Edinb. Phil. Mag. ser. 3, vol. xvi. p. 345, 1840) were 

 from the Post-Glacial Eiver Bed. A Sturgeon plate in the King 

 Collection in the Museum of Practical Geology, has for several 

 years borne on the label " Accipenser latirostris." Prof. W. Boyd 

 Dawkins has entered it in his MS. catalogue of this collection as 

 " Acipenser " ; but I am not aware that the occurrence of the genus 

 in the " Forest Bed " has hitherto been published. 



A large number of fish teeth, scales, and bones have been obtained 

 within the last few years by Mr, A. Savin and my colleagues Messrs. 

 J. H. Blake and C. Eeid, and among these a number of new forms have 

 been determined ; so that we are now in a position to record seventeen 

 species as occurring in these deposits : some of which are now for 

 the first time known in the fossil state. 



Perca fluviatilis. — This species, hitherto known in the " Forest 

 Bed " by scales only, is now represented by several other character- 

 istic parts, which have been obtained from the Freshwater Bed at 

 West Kunton and elsewhere. 



Acerina vulgaris ? — A single small otolith from the West Eunton 

 Freshwater Bed, agrees so closely with that of the common percoid 

 fish, known as the Euff, that it is with some little doubt referred to 

 that species. 



Platax Woodioardi. — The remarkable bones which have been 

 called " Butterfly-bones," and are so well known to collectors of 

 Norwich Crag fossils, have been found in some abundance at 

 different horizons in the " Forest Bed Series," and so also have the 

 enlarged interspinous bones which were included by M. Agassiz in 

 this species. 



Esox lucius. — Dentary bones, isolated teeth and other fragments 

 undoubtedly belonging to this species are, perhaps, more frequently 

 met with in the " Forest Bed " than any other remains. They 

 chiefly indicate fish of moderate size, but occasionally large bones 

 are found. The remains of this species are known from almost 

 all horizons of the series and at numerous localities. 



Barhus vulgaris ? — Two specimens, in Mr. Savin's collection, of 

 pharyngeal teeth and parts of their supporting bones, agree better 



