Natural Hiftory of 
This Inftance affords us a plain Demonftration that the 
curious branched Corallines, defcribed in the Beginning of 
this Effay, are of the Fabrick of Animals. From this, the 
_ moft fimple, we may trace them back through a Variety of _ 
Forms, up to the moft perfect of the whole Tribe = 
Here the curious Naturalift may plainly difcover a Poly — 
branching out like the common frefh Water one of M, — 
Trembley’s, but ftror ly fortified by Nature to fupportitklf — 
in its turbulent Situation ; for he will obferve this is defended — 
by a tough horny Covering, and fixed by its Bafe to folid 
‘Bodies in the Sea, to fecure itfelf from the infinite Number - 
of Enemies, that every Moment furround it: Whereas the 
frefh Water one, being confined to the calm and theltered — 
Situation of Ponds and Ditches, does not ftand in need of — 
fo neceflary a Provifion for its Defence. i 
