[ 8 46 ] 
different fhapes or coverings in different parts of the 
the world. For this end I have confulted that ex- 
cellent collection in the Britifli Mufeum, and fome 
others in the cabinets of my curious friends. 
In this inquiry I met with fome very rare ones, 
which have not yet been defcribed, as you will ob- 
ferve in the annexed plate [See Tab. XXXIV.], 
where I have given exaCt drawings of yours, as well 
as the other fpecies of this genus. 
This marine animal is called, by writers on natural 
hiftory, Balanus, and Concha Anatifera : but the 
celebrated Profeflor at Upfal, Dr. Linnaeus, calls the 
internal aCtive part, or filh, the Animal Triton, and 
the covering or teffaceous habitation Lepas, which 
he fays is a multivalved fhell, compofed of unequal 
valves. The Animal Triton he defcribes, as having 
an oblong body, a mouth with a tongue in it, twifted 
about in a fpiral manner ; ffxteen tentacula or claws : 
fix of the hinder ones on each ffde, he fays, are 
cheliferous. 
This account differing from that given by the in- 
genious Mr. Turberville Needham, F. R. S. in his 
Microfcopical Effays, I Ihall give the character of 
this animal, as it appeared to me from the many 
obfervations I made on it, while alive in fait water ; 
and thefe I compared not only with many dried fpe- 
cimens of other varieties, but likewife with fome of 
yours, that were preferved in fpirits ; and I found 
that the parts of the animal agree in all the fpecies. 
The experiments, that I made, were on the com- 
mon Englifh Barnacle, which is very frequently met 
with, at this time of the year, on oyffers and other 
fhell-fifh. The microfcope, that I made ufe of to 
obferve 
5 
