C ) 
2, He calls this Snail Conchylium, and by that general 
Kame diftinguifhes it from all the other forts, concern- 
ing which he treats in fever al Chapters ; which tho* in 
general it take in both kinds, as well turbinate as Bi- 
valve ; yet it does more particularly denote a Concha or 
Bivalve. 
3. The Onyx is exprefly reckoned by Pliny amongfi. the 
Bivalves, For (/. 32. c.n.) he makes all thefe Sy- 
nonymous, Solen> five Aulos, Jive Donax, five Onyx, five 
Dallylus. And again more particularly, ( lib. 9. c. 61.) 
he fays, Conch arum genere funt Datlyli, ab Humanorum 
ZJnguium fimilitudine appellati. So that in all probability 
the Onyx Odoratus brought more anciently out of the 
frelh- water Lakes about Ganges in India, was not unlike 
the common Onyx of the Mediterranean, which was of 
the Solen kind. 
Whatever the Blatta Byzantina of our Shops is, which 
has certainly nothing of the Characters of the ancient 
Aromatick Zfnguis ; and which in all probability w as loft 
upon the account of the difficult PafTage from Ganges into 
Europe. I lament its Lofs, which I have reafbn to believe 
was a good Medicine, from its ftrong Aromatick Smell 
which is much wanting in our Tejlaceous Powders, of 
which this was one of the number, fo much ufed, and 
that not without good reafon now-a-days, which are all 
very flat and infipid. 
To the Third, The Purpura of the Ancients is well 
made out, and figured by Fabius Columna : And it is one 
of the moft common Murices of the Mediterranean Sea. 
In this he could not be much miftaken, becaufe, as I re- 
member, he fome where mentions heaps of thofe Shells 
where the Qfficitue Purpura anciently were ; and alfo 
from the Purple Sanies the Fifti yields of it felf. He 
mentions one or two more Species of Turbinate ' Snails, to 
be found in the Mediterranean, which yield a Purple 
Juice. Upon the whole matter it is indifferent, what 
fort ! 
