[ 42 ] 
Tom. XI. p. 86. See. and p. 147. See. Tom. XII. 
p. 63.; and Memo: res de l' Acad. Roy. des Sc. Ann. 
1762. p. 206. Sec. But, inftead of meeting with 
fads which could difprove my opinion, I found ob- 
lervations and arguments which confirm it. One very 
material fad, which Mr. Daubenton furnifhes in fup- 
port of my hypothefis, is the comparifon of the Ame- 
rican thigh - bone, with that of a real elephant ; both 
of which he has reprefented in figures, which 
appear to be done with accuracy. To me it feems 
mod evident, that they are bones of two diftind 
fpecies. The vaft difproporttonal thicknefs of the 
American bone, compared with that of the elephant, 
is furely more than we can attribute to the different 
proportions of bones, in the fame fpecies, which 
arife from age, fex, or climate. But Mr. Daubenton, 
to fupport his hypothefis^ that the American femur 
is elephantine, is obliged to refer the great difpro- 
portion in thicknefs to the caufes above-mentioned ; 
and he affirms that in all other circumftances they 
are exadly alike. Now, to my eye, there is nothing 
more evident, than that the two femora differ widely 
in the fhape and proportion of the head; in the 
length and diredion of the neck ; and in the figure 
and diredion of the great trochanter : fo that they 
have many charaders, which prove their belonging to 
animals of different fpecies. 
In order to prove to the fatisfadion of the fociety, 
that the incognitum of America is of a very different 
fpecies from the elephant, 1 have added three draw- 
ings of the jaw-bone of that animal ; which the 
curators of the Britifh Mufaeum were pleated to give 
me leave to take, and which Mr. Rymfdyk executed 
with a mod: fcrupulous exadnefs: and that the conv 
parifon 
