[ 8 53 ] 
fents two of the opercula of this Barnacle remarkably 
horned. The fhell of this is very thin ; but its ob- 
liquity may probably be owing to its fituation. 
Fig . i y. This egg-fhaped Barnacle with a fmali 
mouth is found in cluflers flicking to the Buccinuin 
tribe of fhells in the Weft Indies. 
Fig. i6i is the Cornifh Barnacle, fhaped like a 
cone, and with a fmali mouth. This is defcribed 
and figured by the Rev d . Mr. William Borlafe, F.R.S. 
in his Natural Hiftory of Cornwall, lately publifhed. 
Fig. 17. This is the common Englifh Barnacle, 
that is found in fuch plenty upon all rocks and fhells 
round this illand. From the animal of this, exa- 
mined in the microfcope, I have taken the character 
of the fifh of the Barnacle genus. 
Fig. 18. This I have called the Limpet- fhaped 
Barnacle, from its likenefs to fome fpecies of that 
fhell. I am indebted to our late worthy member, 
Mr. Arthur Pond, for this (hell, who affured me it 
was brought to him from Greenland. It was, with 
feveral more, found flicking to a very large fpecies 
of mufcle. 
Fig. 1 p. a. This Sea-Fan, with the Barnacles in- 
clofed in it, was brought from Gibraltar. I have 
called it the Slipper Barnacle, from its fhape. See 
Fig. 19. Thefe fhell- fifh adhere, while they are 
young, to the flender branches, which are produced 
by the animals that compofe this fpecies of Sea-fan > 
and as the next fucceffion of young animals of this 
fea-fan creep up its fides, to increafe the bulk and 
extenfion of thefe firft- formed ramifications, they in- 
clofe the fhells all round, leaving only their mouths 
or apertures open, for the Barnacles to procure their 
food. 
