14$ Of Shells. PartI. 
ORIENTAL PEARL, round, andwithagood 
Water. 
PEARLS of the bignefs of a large Peas, and perfectly 
round, but without a Water. 
ROUND PEARLS, of divers Colours,^. White, Afhen, 
Brown, Red, and Bay. 
PEARLS of divers Figures, fc. Oval, Cylindrical, Flat, 
Conick, Twins, and three and four together. 
WELSH-PEALR. Given by the Honourable Mr. Boyle. 
They are molt of them flatifh, and of a fhining blackifh 
colour. 
Heretofore, the moft rich fiftiing for Pearls, was at the 
Gefncr. Ifland Margarita. Whence their Name, (a) At this time 
the chief Fifhings in the Eaft-Indies are three, the Perfian- 
Gulpb, on the Coaft of Arabia the Happy, and in the Ifland 
Ceylan. In the Weft-Indies, five 3 along the Iflands Cubagna, 
and Manguerita,zt Camogete,Riodela Hacba,znd St. Marthas. 
They fifh in twelve-fathome Water,five or fix leagues off at 
Tavem. Sea, Spring and Fall, (b) 
ian-%- of p ear / s we nave t ] ie f e following Preparations, and 
probably the firft, of all, the beft, if perfectly ground. 
Pulvis, Efentia, Flores, 
Sal, Tinfiura, Magifterium 
Liquor, Arcanum, 
The PEARLY OYSTER. Concha Calata. Tis fliaped 
much like the Mother of Pearl, but is fomewhat oblong. It 
hath alfo a pearly-colour within-fide 5 but of a more leaden- 
water. 
The SQUARE-MUSCLE. Concha Rhomboidea, f. Muf- 
culus ftriatus Rondeletio. That part where the Valves joyn, 
/. e. the Bafe, is long, not rounded, but ftrait, and ftandeth 
erecl: or perpendicular, by which it may be diftinguiflied 
from other Shells. It lies in the deeper parts of the Sea, and 
is rarely found. 
The RUGGED-OYSTER. Not defcnbed, that I know. 
The Joynts hereof very fhallow. The Navle very oblique. 
The Sides thence produced, diffimilar. The Back cut with 
round Furrows3 an d the Furrows edged, and befet with a 
number 
Commune 
)Butyraceum 
)Plumaceum 
