joynt 6i every Branch, whereas tliey grow only on the in- 
fide, (all the hind part being perfeftly bare) and look riot^ 
unlike a ruffled Feather ftript oa one fide. I cannot guefs 
at the ufe ot thefe curious ramifications, unlefs they ferve 
to draw in food to the Creature, which cannot move out 
of its place. For keeping them alive in Sea-water, I faw 
them often put them out thro the flitot the Operadp^mwhkh 
clofes the top of the Shell, and draw them in again. This 
as I remember the Naturalifts call a BaUms and clafsit with 
the Coffc&a Anatifera. I never faw the latter, but that being 
much larger, if Qas *tis probable) it has the like Organs, we 
fiiay eafily account fcr the raiftake of even fome obferving 
Men, who affirm they have feen them Feathered, and think 
them Birds in ficru I have herewith fent you fome Mufcle- 
(hells with thcle Balam adhering to them, and becaufethey 
are tender to manage, and great care is required to take 
them clean out, and difplay thefe^curious parts, fo as to ly 
fair and in good order, I have fpread i or 5 of them on a 
piece of Glafs, that you may fee them your felf. I have 
elfo lent you fome CancelU (a Lobfter like Animal) in the 
Perewinkle Shells which they inhabit, and have broken off 
fome of the Shell of one, that you may fee how this Fifa 
holds hi'mfelf in by an hook on each fide of his Tail. Thefe 
G^/re/// are excellent Meat* 
Some of the Mufcles which I brought were lirtle above 
a quarter of an Inch long. I to^k one of thefe one of the 
Sliel!,. and expofed it to the Microfcope on a thin Plate of 
Mufcovy Glafs, and holding it to the light ot a Candle, I 
faw in the thinner parts a vaft number ot Veins and Arte- 
ries, and the blood circulating in them more ciiftinftly than 
I ever faw it in any other Animal For 1 had this advan- 
tage in the Obfervation, that the Obicft lay always quiet, 
without changing Place, and my Plate was fo thin, that I 
could bring to it y/hat Magnifiers I pleafed, and look with- 
out difturbance as long as I pleafed, and \ had iP.oreover 
thesSatisfaftion of (hewing it to 2 or 3 curious Perf)ns,who 
had 
