I 
162 The Hiftory ^ANIMAL S. f 
is narrow and fomewhat pointed: both the valves are gibbofe, and the fhell confide- 
rably deep: the ground is a deep and fine violet purple;, the variegations are 
brown and whitifh, or grey* 
It is found on the coafts of the fouthern parts of America; it is met with in fome 
of our collections, but is not common. 
Mytulus ovato-conicus , maximum rugofus , et Jlriatus . 
The ovato-conic , greats ftriated , and rugofe Mytulus . 
%lyt 
^partita* 
This is one of the largeft of the bivalve fhells; it is frequently two feet long, and 
near one foot in breadth: the valves are neither of them very deep, fo that the cavity 
of the fhell is fhallow, in proportion to it’s great extent; it is fmall and narrow at the 
head ; from thence it defcends growing gradually larger for two thirds of it’s length, 
and forms fo far a part of a cone: but from thence to the extremity, though it conti¬ 
nues dill growing larger, it afliimes a rounded figure, and at that end forms the larger 
extremity of an oval: the colour of the outfide is an olive brown ; within it is partly 
of a pearly hue, partly reddifh : the external furface is rough and elevated in many 
places into a kind of fquammas, and is furrowed longitudinally from near the top to 
the bottom. : 
It is a native of the Eaft Indies, and of fome other parts of the world. 
Mytulus conicus fqua?nmofus et echinatus . 
The conic ^ fquammofe y and echinated Mytulus. 
This is fix or feven inches in length, and three in diameter at the bafe, from whence 
it gradually becomes fmaller to the oppofite extremity; it does not fwell into a round- 
nels, as the former fpecies toward the bafe, but the extremity is, however, a little 
bellied out, not plainly truncated : the colour of the fhell is a pale olive on the outfide, 
and a fine pearly white within; the external furface is deeply furrowed in a longitudi¬ 
nal dire&ion ; the furrows run at fome diftances, and the elevated parts between them 
are confequently broad : they have a kind of fquammas or fcales rifing on them, which 
terminate, many of them, in prickly points., 
It is a native of South America; we have it alfo fometimes from the Afiatic and 
African fhores. 
The other fpecies of the Mytulus are numerous, and are called by authors by three 
names: the Pinnae Marinas, Mufculi, and Tellinae. 
1. Of thofe called Pinnas Marinas, that is, fuch as are flat, oblong, and terminated 
at one extremity by a point, there are, 1. The large, blackifh-brown, Magellanic 
Pinna. 2. The lefler, very deeply flriated Pinna. 3. The ftriated and elegantly varie¬ 
gated Pinna. 4. The large, fmooth, olive-coloured Pinna. 5. The narrow, paler 
brown Pinna. 6. The narrow and fomewhat deeper Pinna. 7. The elegant blue 
Pinna, ftriated deeply in the lower parts ; this is a very fcarce (hell. 8. The fmall, 
rofe-coloured, variegated Pinna. 9. The grey, deeply ftriated Pinna. 10. The large, 
pale brown, lightly ftriated Pinna, of Newfoundland. 11. The fmaller and fmoother 
Pinna, of the Canada lakes. 12. The reddifh-grey, large, rough Pinna. 13. The 
dufky, red, aculeated, and deeply furrowed Pinna. 14. The lefler, deep brown 
Pinna, called Pinna Tridacna by Rondelet. 15. The rounder-ended Pinna, called 
the Duck-billed Pinna. 16. The very long, narrow, truncated, and elegantly ribbed 
Pinna. 
2. Of thofe which have the valves deeper, or more gibbofe and equilateral, and are 
called Mufculi and Mufcles, there are, 1. The greyifh-white, very thin-fhelled Muf- 
cle. 2. The bright, filvery-white Mufcle. 3. The oblong Mufcle, which buries it- 
felf in ftones, and is called Pholas. 4. The fhorter and more elate, black, faxatile 
Mufcle or Pholas. 5. The brown Mufcle, which never clofes it’s fhell, but has a 
large flefhy body, and a trunk. 6. The lefler, open Mufcle, with a deep brown, 
obtufe fhell. 7. The dufky-brown, obtufe-ended, American Mufcle. 8. The fmall 
and elegantly variegated Mufcle. 9. The deep red Mufcle. 
3. Of thofe which have equal extremities, and are of an oblong figure and plane, 
and are called by many writers on thefe fubjedts Tellinae, there are, 1. The fmooth, 
large, violet-coloured Tellina. 2. The fmaller, purple and white, elegantly varie¬ 
gated 
