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original bone. Plate XIX. Fig. 12, are two bufonitae, attached to a part 
of the jaw, and supported by their original columnar bony processes. 
Sir Hans Sloane relates, that among some fossils which were shown to 
him from Maryland, he perceived one which agreed very closely with 
the bony tongue of a fish which he had seen in Jamaica ; and on com- 
parison with a tongue of this kind, found in Mr. Charlton’s collection, 
from the Pastinaca marina, he found their agreement very exact*. 
I am happy in being able to place before you two illustrative 
specimens of this kind. Plate XIX. Fig. 16, is a fossil from the Isle 
of Shepey, which appears to have belonged to some fish of the genus 
Raia, being very closely accordant with the recent bony tongue of 
the fish of this genus, figured, in outline, Plate XIX. Fig. 13. I 
have another recent specimen of this kind, the jointed bone of which 
is longer, and exactly agrees with that figured, by Sir Hans Sloane, 
as the tongue of the Raia pastinaca. 
Another fossil specimen of this kind, in my possession, is con- 
siderably larger than the one which I have here figured : and in my 
friend Mr. Crow’s collection, of Faversham, is one which is six 
inches in length, and three inches and a quarter in breadth. 
The structure of this body, as is most evident in the analogous 
recent specimen, is singular and interesting. It is formed of two 
horizontally-disposed laminas ; the upper of which is of a very close 
and dense structure, and forms the masticating surface ; the other is 
of a more cellular texture. Both these substances are transversely 
divided into six plates, which are united to each other by very fine 
and close sutures, and have a row of interstitial substances, of a 
hexagonal form, placed between their lateral terminations. This 
body, as appears in the recent specimen, was attached to the sur- 
rounding bones : the masticating surface is placed upwards in the 
fossil, as well as in the recent specimen. 
* Phil. Trans. Vol. xix. No. 232. 
