Articulated CoraLiines. 
CHAP, V. 
Of the Articulated Corallines. 
S the Corallines hitherto deferibed took their Rife from 
hollow, flexible, and horny Tubes, cither fingle, or 
many together ; and proceeding uniformly to their Vermi- 
nations in Branches, confifting either of fimple Tubes, or 
of fuch as are furnifhed with Denticles, or Veficles, or both, 
or of connected Rows of Cells; fo thefe, which we call ar- 
ticulated Corallines, are obvioufly diferent in their external 
Appearance, and in their Structure; though the Ufe of all 
the Kinds appear manifeftly to be the fame ; vsz. the Places 
- of Abode of different Species of Polypes. 
This Kind then, carefully examined by the Microfeope, 
appears to confift of fhort Pieces of a ftony or cretaceous 
brittle Matter, whofe Surface is covered with Pores, or Cells. 
Thefe ftony Pieces, or Joints, are united to one another by 
-a tough, membranous, flexible Subftance, made up of many 
{mall Tubes of the like Nature, compacted together. 
When thefe are put into Vinegar, the ftony or cretaceous 
Part is foon diffolved, and leaves the other Part intire, which 
not only forms the ligamentous pliant Articulations ; but is 
. likewife the Subfratum, and even forms the Cells, of the 
_ftony Joints themfelves. bi : | 
_ Among the firft of thefe 1 fhall place ; 
aaa N*% 2. 
45 
