﻿56 CHIM^ROIBEl. 



This may be regarded as the type species of the genus as here 

 defined. 



Form. <$■ Loc. Bathonian (Stonesfield Slate) : Stonesfield, Oxford- 

 shire. 



P. 486. Right mandibular tooth, inner aspect, to be regarded as the 

 type specimen ; figured by Agassiz, torn. cit. pi. xl. fig. 7. 



Egerton Coll. 



P. 3100, P. 3105 a. Two left mandibular teeth, exhibiting the inner 

 aspect, labelled by Agassiz. Enniskillen Coll. 



36584. Broken left mandibular tooth, inner aspect. 



Purchased, 1862. 



P. 5108. Left mandibular tooth, outer aspect. 



Presented by J. E. Lee, Esq., 1885. 



P. 485. Eight palatine tooth, exhibiting only the superior aspect, 

 figured by Agassiz, torn. cit. pi. xl. fig. 6. Egerton Coll. 



P. 1133. Left palatine tooth, oral aspect, figured in Proc. Geol. Assoc, 

 vol. xi. pi. iii. fig. 4. Egerton Coll. 



P. 3100 b, C. Two similar left palatine teeth, one being shown, of the 

 natural size, in PI. I. fig. 9. The oral aspect not being 

 exposed in no. P. 485, these two specimens, with no. 

 P. 1133, cannot be precisely compared, but their identity 

 is probable and one is labelled " Chimcera owenii, Buckl.," 

 in Agassiz's handwriting. Enniskillen Coll. 



P. 3100 a. Right vomerine tooth, resembling that of Ischyodus in 

 form, and labelled by Agassiz as pertaining to this species. 



Enniskillen Coll. 

 Two "species" of Ganodus — G. falcatus, Egerton 1 , and G.psitta- 

 cinus, Egerton 2 — have also been founded upon mandibular teeth 

 exhibiting the external aspect, and are not yet distinguishable with 

 certainty from G. oweni. Both type specimens were obtained from 

 the Stonesfield Slate, and are contained in the Egerton Collection. 

 Of the left mandibular tooth described and figured as G. falcatus 

 (P. 482), it is not improbable that the form of the oral margin and 

 the prominence of the beak are due to accident ; and, though 



1 Quart. Journ. Geol. Soc. vol. iii. (1847), p. 352. Chimcera falcata, Proc. 

 Geol. Soc. vol. iv. (1843), p. 154. Ischyodus falcatus, Sir P. Egerton, ibid. 1843, 

 p. 156. Chimcera {Psittacodon) fcdcata, L. Agassiz, Poiss. Foss. vol. iii. (1843), 

 p. 349, pi. xl. c. fig. 13. 



2 Quart. Journ. Geol. Soc. vol. iii. (1847), p. 352. Chimcera psittacina, Proc. 

 Geol. Soc. vol. iv. (1843), p. 153. Ischyodus psittacinus, Sir P. Egerton, ibid. 

 1843, p. 156. Chimcera {Psittacodon) psittacina. L. Agassiz, Poiss. Foss. vol. iii. 

 (1843), p. 350, pi. xl. c. fig. 12. r 



