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XX. On the formation of fat in the intestine of the tadpole , 
on the use of the yelk in the for mat wi of the embryo in the egg . 
By Sir Everard Home, Bart. V. P. R. S. 
36 t M29ngBITI "fO 9 ■? A - 9.rit 'lO 90IjboTq 9fiT 
soh Head May 23, 1816. 
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he tadpoles in England are so small, that np person has 
attempted to make an accurate investigation of the internal 
changes of structure that take place in them, between the time 
of the animal leaving the egg and becoming a frog. 
The rana paradoxa of Surinam, in its tadpole state, is larger 
than in any other species of frog yet known, and so closely 
resembles fishes, that in that country it is sold as such in the 
market, for the use of the table, under the name of Jackie ; 
and, as the frog produced from it, is in the first instance as 
£3 
large as a common frog in this country, it is highly probable, 
that it becomes an animal of considerable size. Mr. Ireland. 
V* a, NJLJ.V/A/ W 1 
a surgeon in the army, ’yvho resided several years at Surinam, 
and watched the tadpole through many of its changes, has 
brought home specimens in different stages of its metamor- 
phosis. These he has kindly submitted to my examination, 
and has in the most liberal manner, deposited the specimens 
in the Museum of the Royal College of Surgeons in London, 
of which he is a member. 
As Mr. Ireland had no opportunity of examining the tad- 
pole, before the hind legs begin to make their appearance 
through the skin ; with a view to render the series complete, 
I have since examined the progress of the changes, from the 
