FOSSIL FISHES. 



307 



any intermixture of other organic remains, which 

 are spread over such wide areas of the Wealden 

 formation, afford, therefore, decisive proofs of 

 tranquil subsidence in freshwater. 



.-,;' % 



' •'?- 



LIGN. 2o. 



FOSSIL CYPRIDES; FROM BROOK BAY. 



Fig. 1. Cypris spinigera ; the small figure shows the natural size. 



2. Cypris granulosa. 



3. — Valdensis. 



4. Clay, with numerous cases of the species represented fig. I, of the 



natural size. 



Fossil fishes. — But few remains of fishes have 

 been found in the Wealden of the Island ; those 

 which have come under my notice are some 

 small teeth, and a fin-bone, of a species of Hy~ 

 bodus (see p. 233) ; and several teeth and scales 

 of the Lepidotus, a genus of extinct freshwater 

 fishes, with very thick, enamelled, rhomboidal 

 scales, and obtuse hemispherical teeth ; the latter 



