332 Mr. Hatchett's Experiments on Zoophytes, 



acid ; and, after some hours, a substance remained, which com- 

 pletely retained the original figure of the Millepore. 



The substance which thus remained, was composed of a 

 strong white opaque membrane, which formed the external 

 part; the interior of this, was filled with a transparent gela- 

 tinous substance. Ammoniac produced a very slight precipitate, 

 which, being dissolved in acetous acid, was proved to be phos- 

 phate of lime, by solution of acetite of lead. Carbonate of soda 

 afterwards precipitated a large quantity of carbonate of lime. 



Mittepora cellulosa. 



This Millepore effervesced much with dilute nitric acid ; and, 

 when this had ceased, a finely perforated membrane remained, 

 in structure and appearance like the original substance. 



Ammoniac did not produce any effect ; but a large quantity 

 of carbonate of lime was obtained by carbonate of soda. 



Millepora Jascialis. 



This resembled the former in every particular; and left a 

 membrane perfectly like the Millepore. 



Millepora truncata. 



When treated with dilute nitric acid, it effervesced much, like 

 the former ; and, after a few hours, a semi-transparent membra- 

 naceous substance remained, which exhibited completely the 

 shape and structure of the original Millepore. 



Ammoniac did not disturb the transparency of the solution ; 

 but the whole of the dissolved portion was precipitated, in the 

 state of carbonate of lime, by carbonate of ammoniac. 



The remark lately made on the Madrepores may here also 



