of Keratophyta. 6l 



Fig. T^ is a microfcopica] Reprefentation of two of thefe 

 Divifions, with their little Tubercles. 



One of thefe Diviiions being put into an acid Menflrawn^ 

 the calcarioiis Matter was eafily diflblved, and the two Side- 

 Tubercles, at Fig. /^, were exhibited to View, divefted of 

 their CrufI: or calcarious Covering ; and here we plainly dif- 

 covcred two Polypes with their Claws or Te?itaculi contraft- 

 ed. Thefe, we perceived, were both united to the main 

 Body of the Animal, by a flender flefhy Subflance that pro- 

 ceeded from the Bottom of each. This flefhy Subftance, that 

 conftitutes the Centre of the Stem, or main Body of the 

 Animal, v/e can eafily trace through the Middle of the Stems 

 and Branches of the Keratophyta^ when the calcarious Co- 

 vering; is taken off. 



In the fame manner, v/e may perceive the Polypes by 

 Pairs inferted into the central flelliy Stems of the veliculary 

 Coralline, N°, 7. Plate IV. at Fig. 6", and in N\ 8. Plate V^ 

 at Fig;. A. 



I have now before me Specimens, that prove the horny 

 Circles, which furround and compofe the Stem and Branches, fiJ. c. a^' 

 to be the Work of Animals ; one particularly of the Kerato- 

 phyta^ or Sea-fans, called by the celebrated Liirmceus^ Flabel- 

 lum Feneris (See Plate XXVI. Fig. A) ; which, by fome Ac- 

 cident, has had one of the main Stems belonging to the 

 Pranches broke quite acrofs, at Fig. B. But the broken Parts 

 have been kept near to one another by the fmall reticulated 

 Side-branches, at Fig, D. The Animals, in the Progrefs of 

 their Tubes upwards from the Trunk, Fig. /iT, as foon as 

 they met with this Obftru6lion of the broken Stem, turned 

 off to one Side, and proceeding along the reticulated Branches, 

 towards Z), covered over the vacant Spaces with their horny 



and 



