Microscopical Essays. 42a 



notwithstanding the apparent improbability of the circumftance, 

 they live and aft as before. The lining, or coating, of the 

 ftomach now forms the epidermis, and the former epidermis now 

 constitutes the coating of the ftomach. A polype thus turned 

 may often have young ones attached to it's fide. If this is the 

 eafe r after the operation they are of courfe inclofed in- the ftomach. 

 Thofe which have acquired a certain fize extend themfelves to- 

 wards the mouth,, that they may get out when feparated from the 

 body ; thofe which are but little grown turn themfelves infide out, 

 and by this means place themfelves again, on the outfide of the 

 parent polype.. 



The polype thus turned, combines itfelf a thoufand different 

 ways.. The fore-part often clofes itfelf, and becomes a fuper- 

 numerary tail. The polype which was at firft ftrait, now bends 

 itfelf, fa that the two tails refemble the legs of a pair of compafTes^ 

 which it can open and (hut. The old mouth is at the joint as it 

 were of the compaffes ; it cannot, however, acl as one, fo that a 

 new one is formed near it, and in a little time you have a new 

 fpecies of hydra with, feveral mouths,.. 



Fig. 18, Plate XXIII. B, reprefents the upper part of a polype 

 that has been divided into two parts, a the upper, c the lower 

 part, the end c being fomething larger than that of a common 

 polype, and is fenfibly perforated; in the fummer time this part 

 often walks and eats the fame day it is cut. 



Fig. 17, the other part of the fame polype; the anterior 

 end is very open, and the edges of it turned a little outwards, 

 which afterwards folding inwards, clofe the aperture, This end 



now: 



