C 4s ] 
k for a particular fub fiance or body; but having ex- 
amined it, I obferved it was only a pellicle, or mem- 
brane, that covered a part of the papilla I mentioned. 
This membrane has lixteen reparations, which form 
kinds of purfes, and yet leave, in the center of the 
animal, an empty fpace, wherein feveral glands are. 
brought in view. I do not know, whether, in the 
natural flate, thefe membranes, do- not retire to the 
circumference, in order to difcover the glands with- 
in, which they ufually hide, and which fill up all the 
middle of the crown ; but when the flefhy body is 
gone up again,, it covers all the interior parts, clofes 
them in, and preferves them from the touch of any 
extraneous body. I cannot tell how thefe fifhes live, 
or what is their mechanifm ; for I could not diilin- 
guifh either a mouth, or any vifcera , nor any other 
organ ferving to their nourifhment.. 
CXI IT. An Account of feveral rare Species 
of Barnacles. In a Better to Mr. Ifaac 
Romilly, F. R. S. from John Ellis, Efp\, 
F. R. S. 
Dear Sir, ' London, Dec. 21 . 175S. 
Read pec. 21, A* y ^ H OS E rare and very extraordinary 
X new fpecies of Barnacles, which 
you have lately received from abroad, are fo different 
from any of the common fpecies, that I have feen, 
that I was refolved to inquire into the nature of an 
animal, which,, like a Proteus, appears in fo many 
ditTerenti 
