of KERATOPHYTA. 
_ Specimens of a very young Growth, viz. 2 or 3 Inches high | 
have the Appearance of a {mall calcarious Sprig. When this 
is diffected length-ways, and viewed with Attention, we find 
inthe Centre, a flender horny Tube, with fome whitith 
‘Matter in it like Pith ; next to this Tube are other very {mall 
Tubes of a calcarious Subftance, that adhere to it, and fur- 
, round it, covering over even the Point of the Top. 
| In more advanced Specimens, where they branch out, 
thefe fine calcarious ‘Tubes fend out little Cells of Animals of 
the Polype kind, with proper Openings to them all. Thefe 
Cells are difpofed along the Branches always in fome regular 
Order, with great Exadtnefs, according to the particular 
Species ; not like the Nefts of Infeéts on Plants, which are 
accidentally placed here and there; and which many ima- 
gine them to be; but in much the fame precife Form and 
Manner, that we obferve in the Cells of the Corallines. — 
From thefe Cells the AAT have been difcovered ex- 
tending themfelves, as well to procure Food for themfelves, - 
as Materials for the Increafe of this fuprizing Structure: But 
this will be made clearer to us from fome following Obfer- 
Waar’: ve 
. When Infeéts infeft a Vegetable, to devour its Leaves, 
and build their Nefts upon its Trunk and Branchs, they are 
rarely obferved to cover the whole Bark from the Bottom of 
the Trunk, to the utmoft Extent of its Ramifications: But, 
admitting this fhould happen to be the Cafe, I believe it will 
~ beallowed, no-body ever faw Plants, fo totally incrufted over | 
with the Cells of Infe@ts, live and flourifh after. It has been 
generally remarked, that real Sea-vegetables, of which there — 
area confiderable Variety, are as much fubject to be attacked 
by different kinds of Sea-Infects, who build their Nefts on 
ahi . Hh I 2 them, 
