a new Fossil Animal. 
593 
P. S. While this paper was passing through the press, the author 
has received a communication from a friend resident in Paris, in 
which it is stated, that the discovery of the composition of the lower 
jaw of the Ichthyosaurus in a manner analogous to that of the 
animals of the Saurian family, had been anticipated by Mr. Cuvier, 
and communicated in the autumn of 1820 to Messrs. Leach and 
Clift, although it appears that the general fact only had been 
observed, and that the details of the structure of this part had not 
been fully examined. 
The author is happy to have an opportunity of making this 
acknowledgment ; he was entirely ignorant of this anticipation until 
his own observations had been committed to the press. 
known species of Crocodile, as the osseous remains discovered at Honfleur and Havre, 
with which they also accord in their mode of petrifaction, and in the nature of the 
stratum in which they are entombed. Vide Cuvier, Anirnaux Fossiles, Tom. IV. p. 
17, 18. 
Crocodiles. 
Tab. XXXIII.— ^All the specimens delineated in this plate are from the upper chalk. 
Fig. 1. Conical striated tooth. Mr. Konig supposes it to belong to the 
Ichthyosaurus, others that it resembles the incisor teeth of Anarrhicus 
lupus. 
Fig. 10. Vertebra of the Ichthyosaurus ? 
Fig. 13. Certainly the vertebra of a species of Crocodile. 
Tab. XXXIX. — Dorsal fin of a fish of the genus Balistes? in chalk. 
Tab. XLI. — Fig. 1. “ Very like in miniature the large amphibious animal of Maastricht 
in our Museum : I should not hesitate to consider it as a species of 
lacerta.” — Mr. Konig. 
Fig. 2. Front view of the two anterior teeth. I do not think that this specimen 
may not have been the jaw of a fish. 
Fig. 3. Two vertebra of the celebrated animal of St. Peter’s mountain : these 
certainly resemble the specimens in the British Museum, and also those 
figured by Faujas St. Fond. 
Tab. XLII. — The whole of the specimens figured in this plate were discovered in one 
block of chalk. The remains of an unknown fish ? some say Lacerta ? 
4 f 2 
