184 Supplement to the Zoology. 
_In the Sth voluine of the transactions of the Linnean So- 
ciety, p. 227, is a description of this creature, called the 
mus bursarius ; done from a drawing communicated by 
Major-General "Thomas Davies, F. R. and L. 8. The fig- 
ure is of the natural size ; and represents the 3s go bags 
projecting from the sides of the neck. They are so enor- 
mous, that the animal must have besn very much incommo- 
ded by them, both in travelling and in eatin 
Afterwards a dead specimen was sent to England by La- 
“dy Prescott, from Canada, where he was killed by an Indian 
in 1798. A description of this preparation was made 
George Shaw, M M.D. and dinserted with figures in his General 
Zoology, part 1. vol. 2, p- 100.. In those drawings, the 
sacs are delineated as distended like two blown bladders, 
giving the Canada Rat, as he is called, a very grotesque 
pearance 
 Notwithétending all this testimony, doubts were entertain- 
ed in Aree et en existence of such an ani- 
= : % Be possession, 
a just drawing thereof, are, for the 
Sant sooltgise there: Pier 2a count of 
ning an 
his character and ap yearance, was oabhahea in the Medic- 
al Repository for January, 1821, p. 249—250. The. 
pouches are very conspicuous in both. 
What could be plainer than all this? It would — 
there was no room for a deception. Yet in this very c 
a material error exists, which it is the object of this Gees 
munication to expose. 
Thad supposed the sacs as they appeared in the dried spe- 
cimen, were natural; and that the openings into them were 
from the throat, somewhere between the cheeks and gullet. 
But when Governor Cass and Professor Dotigles vo 
whom I Bec the article, were discoursing with m 
about it, a few days ago, the former gentleman chaatied 
that the pouches dia not appear externally in the living an- 
imal ; that they were concealed within the skin; that the 
— were on the outside of the > and they ‘had been 
averted, like pockets turned inside ut, for th he sake of pre- 
ate them from the oe when tis skin Bie taken off. 
ing them more effectually in the ed prepara- 
tion. Sees the manner sa Bosice eiaiibtornne, 
