CORALLINA. 109 



to point out ; fome of thefe Corallines appear to come 

 the nearer! to it of any thing that has occurred to me in 

 all my refearches : but then the calcareous covering, 

 though ever fo thin, {hews us that they cannot be vege- 

 tables. The white mealy furface of fome of the Lichens 

 would induce one to think them covered with a cal- 

 careous matter : but chemiftry (hews us it is no more of a 

 calcareous nature than the mealy whitenefs on the leaves 

 and bloffoms of the Auricula urfi. 



The minutenefs of the pores of Corallines, though as 

 fmall as thofe of fome plants, is no proof of their beinp- 

 vegetables ; becaufe there may be fuckers that come 

 through thefe pores, which our glaffes cannot difcover y 

 or perhaps they may be like the pores of fponges, con- 

 trived in fuch a manner as to fuck in and throw out 

 the' water. Let us obferve the pores of the Millepores, 

 and we fhall find them equally as fmall in many fpecies 

 as thofe of the Corallines ; and yet thefe are univerfally 

 allowed to be of the animal kingdom. 



For a more particular enquiry into this fubjec~t, I fhall 

 refer the reader to the Philofophical Tranfadtions, Vol. $y> 

 pag. 404. where I have fully explained this matter, in a 

 letter to Dr. Linnaeus. 



1. Corallina tridens. Trident Coralline, Tab.zo. 



Corallina trichotoma This Coralline is jointed, 



articulata, articulis com- and branches out into a diviflon 

 prejfts plants trilobis. of three; the joints are com- 



preffed, with three flat lobes. 



Tab. 20. Fig, a. 



This was found by John Greg, Efq. on the coafi of 

 the new ceded Iflands. 



2. Corallina 



