o//^i5^ English Corals. 77 



Coaft of Cor?iwally growing to Rocks and Shells. The Sur- 

 face of this Coral, upon a nice Examination, appears full of 

 fmall Pores, which almoft difappear, if they have been kept 

 any Length of Time from the Sea. A fmall Piece broken 

 off, and placed in the Microfcope, exhibits fideways a View 

 of feveral Stages of Cells, divided from one another, as at 

 Fig. D. 



If a Piece is put into Vinegar, the chalky Part foon dii^ 

 folves, and the Partitions and Cells become very vifiible. 

 The membranous Part, remaining unaffed:ed by the Acid, 

 makes it probable that it is of animal Conftrudion. 



Fig. /af, N'. 2. reprefents a Piece of this Coral, adhering 

 to a Limpet's Shell. 



We often meet with Specimens of the green Coftferva, or 

 Silk- weed, that grows on the Rocks, with its flender Branches 

 furrounded by thin Incruftations of this Coral ; and fome of 

 the broad thin Fticuss^ with their Surfaces almofl: covered 

 with it. 



CHAP. 



