t 101 3 
into eight parts ( 7 . r, 5,) fG. s, s,) more or lefs even ; 
which form the mouth (Fig. 7 . t, G. t 3 H. a } ) of 
each tubercle, or, to fpeak more properly, of each 
cellule. The bark of the coral ends at the extremity 
of thefe parts : and thus it is, that all the inward part 
of each cellule of the white pellicle is formed. 
§ 25. The white pellicle (D. g, E.n, »,) is dou- 
bled in fome places, and forms a little bag (Fig. F. r, c ,) 
which lines the infide of each cellule (F. t 3 ) that is, 
to the beginning of the lip, or, we may fay, to about 
the middle of the cellule. 
§ 26. The fubftance of the coral (F. 0,) gives 
way to the cellule by fmall cavities : yet thefe are 
not very vifible in the old thick branches, but they are 
pretty eafily feenin the young and llender ( B . a, c 3 ). 
Thus the cellule does not end at the coralline fub- 
ftance ; lince the white pellicle (F. r,) is between it 
and the faid fubftance. The hollow of the cellule 
grows narrow into a fort of cone, (F. /,) with an 
obtufe apex ; the belly of which is greater in dia- 
meter than the bafis. 
§ 27. The bottom of fuch a cellule faces the foot 
of the coral, and its mouth the branchy or molt di- 
ftant part from the foot. In this cellule is lodged 
the polypus , which is vifible to the naked eye, (Fig. 
A. r,) but its exadt fhape is only to be feen by the 
microfcope 5 and it was by this means, that I have 
been enabled to make a drawing of it. 
§ 28. Wherefore it is from each cellule (F. /, c,) 
that a white, foft, and fomewhat tranfparent polypus 
(Fig. M.) comes forth, or extends itfelf ; which, in 
fhape, refembles a Itar with eight equal rays, nearly 
conical, (Fig. P.) and furnifhed with other conical 
appendices 
