: - of KeRraropay tz. 6L 
_ Fig. 7, is a microfcopical Reprefentation of two of thefe 
Divifions, with their little Tubercle. == a 
| One of thefe Divifions being put into'an acid. Menfiruun, 
the calcarious Matter was eafily diffolved, and the two Side- 
Tubercles, at Fig. 7, were exhibited to View, divefted of 
their Gruft or calcarious Covering ; and here we plainly dif- 
covered two Polypes with their Claws or Zentacwli contra- 
ed. ‘Thefe, we perceived, were both united to the main 
Body of the Animal, by a flender flefhy Subftance that pro- 
ceeded from the Bottom of cach. This flefhy Subftance, that 
-conftitutes the Centre of the Stem, or main Body of the 
Animal, we can eafily trace through the Middle of the Stems 
j and Branches of the Keratophyta, when the calearious Co- 
/ vering is taken off. ) CS Oh Paietanen pares 
In the fame manner, we may perceive the Polypes by ~ 
Pairs inferted into the central flefhy Stems of the veficulary 
Coralline, N°. 7. Plate IV. at Fig. C, and in N®. 8. Plate V. 
I have now before me Specimens, that prove the horny 
Circles, which furround and compofe the Stem and Branches, Fis CD. 
| to be the Work of Animals; one particularly of the Kerato- 
i _ phyta, ot Sea-fans, called by the celebrated Linneus, Flabel- 
lum Veneris (See Plate XXVI. Fig. 4); which, by fome Ac-* 
cident, has had one of the main Stems belonging to the — 
~ Branches broke quite acrofs, at Fig. B. But the broken Parts 
have been kept near to one another by the fimall reticulated 
| Side-branches, at Fig. D. The Animals, in the Progrefs of 
their Tubes upwards from the Trunk, Fig. K, as: foon as 
they met with this Obftru€tion of the broken Stem, turned 
off to one Side, and proceeding along the reticulated Branches, 
towards D, -coyered over the vacant Spaces with their horny — 
