60 
Natural Hine 
ikon as the Land-Plants are to their kinds; but then, it is 
‘as commonly obferved, that they fare much alike, that is, 
they perifh, and decay. 
Folie Herring-bone Coralline defcribed at Fig, a, Places x. 
refembles thefe Keratophyta i in the Manner of its Growth very. : 
nearly, except in the Incruftation, and isa miniature Figure _ 
of that pennated Species, callise! » in the Weft-Indies the Sea- 
Feather. | 
In order to thew ‘the. great Agate there is aie as the 
Stru€ture of the pennated Kerarophyta, and the veficulary 
Corallines with Denticles, I fhall here give a fhort De- _ 
{cription of a curious one from Sardinia, called the Sea- 
_ Feather, which I lately met with in the curious Colleétions - 
of Mr.. Baker, and Mr... Pond, Fellows of the Reval So- 
ciety. 
This eal marine Produétion is about a Foot highs 
| T he {mall Pinna, or Side-Sprigs, are placed alternately op- 
polite to. each other, in a regular Order on each Side of the 
main Stem. ‘Thefe are furnifhed with feveral little Clufters 
- of fmall Tubercles placed at equal Diftances, and furround- 
ing the Stem generally three together. W hen they are mag- 
nified, they have much the Appearance of the bearing Buds 
of Fruit-Trees. In this dry Specimen their Tops bend in to- 
wards the Stem of the Branch that fupports them. 7 
‘The whole Surface is covered over with a Galcatios Sub- 
ftance, like moft of this Clafs. ; 
Fig. S, in Plate XXVI. reprefents one of the RavsiGeatiods aie 
with the main upright Stem ; this, we may obferve, has a 
very near Refemblance to the "Form of the Sea-Fir Coralline, 
Heat Fig. 6, pag. 4. | 
Fig, 
oY 
