[ * 7 6 ] 
Know lege. He has made Inquiries about thefe ima- 
gin'd Changes, of People of many Nations, but 
could never learn any thing to the Purpofe. He 
has feen the Fiih itfelf in feveral Countries, and 
found they fpawn'd like other Fifhes, and grew in 
Size, without the lealt Similitude to what has been 
afferted. He adds further, that thefe Fifhes delight 
in very clear Water, in Rivers with flony or fandy 
Bottoms, and are never found in handing Lakes, or 
Rivers palling thro' marfhy or molly Grounds, where 
Frogs chufe mod to be. 
As to my Inquiries concerning xhtCrabs-Eyes, he 
exprelfes a Surprize to find Naturalifls differ to much 
from one another, and yet not one of them he has 
ever feen giving any true Account of the Situation, 
Formation, and calling of thefe concreted Bodies. 
He therefore is fo obliging to fend me the follow- 
ing Defcription from his own Obfervation and 
Knowledge. 
Thofe Concretions called Crabs-Eyes, arc found, 
fays he, in the Bodies of Cray-fifh. Each Fifh an- 
nually produces two, one on either Side of the an- 
terior and inferior Part of the Stomach, and each 
is generated about a Point lying between the Coats 
thereof. The flat or concave Side lies next the in- 
ternal Coat, which is very thin and clear, though 
flrong and horny 5 the convex Side is confequently 
outwards, and is immediately cover'd by the flefhy 
and fofter Coats of the Stomach, whofe Fibres make 
Impreflions on its Surface. Between thefe two 
Membranes it grows by degrees lamellatim , and is 
fupplied with petrifying Juices dilcharg'd through the 
Mouths of Veffels or Sudamina opening on the inter- 
nal 
