The Hiftory ^ ANIMALS. 1 175 
< The animal' inhabiting the ffielly body of this genus is a Triton : the arms of this 
creature, being long, flender, and fimbriated, have, while they are expanded in the 
water, fomewhat of the appearance of feathers; and, as the bodies themfelves, ufually 
adhere, by means of their fleffiy pedicles, to old wood, and the trunks of trees fallen 
into the fea. It became firft an opinion, that a bird of the goofe kind was produced 
from them; and afterwards it was affirmed, that the ffiells themfelves originally grew on 
the trees, in the manner of their fruit: from this arofe the opinion of the barnacle or 
brent goofe being the produce of a tree-; and there have not been warning authors, 
who, though they had feen the fallacy, and known in what manner only it was that 
thefe kind of ffiells were found on trees, have propagated it, by delivering their ac¬ 
counts in fuch words, as gave room to believe they had feen them growing on the 
trees in the manner of their fruit. 
Pentelafmisfubrubens pediculo annulate. 
The reddijh Pentelafmis , with an annulatedpedicle. 0! 
This is the fpecies defcribed, by the generality of authors, under the name of Con¬ 
cha Anatifera, and is that which was originally fuppofed to produce the goofe; the 
others, both of this and the preceding genus, were afterwards defcribed in it’s place, 
and under it’s name. It is a tender and brittle Shell-fiffi ; it’s length is about an inch, 
and it’s diameter three quarters of an inch: it is compofed of five broad and angulated 
valves or parts, which together form an oblong body, (hutting up tolerably clofe in 
all parts, except when the fifh has a mind to thruft out it’s arms : this ffielly part is 
of a pale red or flefh colour, variegated with white; and it adheres to a neck of an 
inch long, and of about a fifth of an inch in diameter, by means of which it is affixed 
to old wood, or to Hones and fea-plants, or any other folid fubftance that lies under 
water: this pedicle or neck, as fome call it, is of a brownifh colour, and annulated 
flrudture, and is firm, tough, and flefhy. 
We ufually meet with vaH numbers of this fpecies together, on the old piles, and 
other pieces of wood that have been long fixed under water, and not unfrequently on 
the bottoms of ffiips that have been long in harbour : fometimes the larger Hones, at 
fmall depths, are covered with them. 
Pentelafmis albefcens pediculo granulato craffo. 
The whitijh Pentelafmis , with a thick , granulated pedicle. 
This fpecies is, in the whole, about an inch and a half in length, including the pe¬ 
dicle : the body is formed of five broad and irregularly angulated ffiells, and is of an 
oblong figure, fomewhat flatted, and obliquely truncated at the extremity: they are of 
a whitiffi colour, with a faint admixture of blue ; the pedicle is very thick and fliort; 
it is not more than half an inch in length, and is continuous to the whole lower ex¬ 
tremity of the body, and equal to it in diameter: it is of a brownifh colour and 
fleffiy texture ; it’s furface is (lightly annulated, the annules, being narrow, fcarce diflin- 
guiffiable, and nicely connected to one another; but the whole furface is granulated or 
chagrined. 
We have this in feveral of the Northern Seas; it ufually grows to the branches of 
the larger fea-plants, and, as it is frequently in confiderable numbers together on the 
fame plant, fome have figured the whole together, and made their readers underfland 
the plant as the ramofe pedicle of the ffiell. 
Pentelafmis violaceus pediculo longiore et tenuiore . 
The violet-coloured Pentelafmis^ with a long , fender pedicle. 
* This is about three quarters of an inch in length in the body, and half an inch in 
diameter; it’s figure is oblong, and obliquely truncated at the upper extremity, where 
it is fmalleH; and it is compofed of five irregularly angulated and flat pieces : it’s 
colour is a fine, deep, violet-blue, variegated with a paler greyiffi-blue, and with white ; 
the pedicle is fleffiy ; it is two inches long, and is not much thicker than a whipcord, 
fo that it is fcarce able to fupport the ffiell eredt. 
We have it in the North about our coafts of Yorkffiire and elfewhere. 
The 
