134 CONCHOLOGIST’S COMPANION. 
Lette evs. 
UNIVALVES. 
et 
To * £ * ® 
Tue following extracts from a series of experiments 
by Mr. Cole, and M. du Hamel, relative to the 
method of extracting the Tyrian dye, will serve to 
elucidate the brief description I have already given 
you. 
When the shells of the purple-producing Murex 
and Buccinum are broken, and the mutilated frag- 
ments carefully removed, so as not to injure the 
inhabitant, the white vein already noticed as the 
reservoir of this brilliant colour, may be observed 
lying transversely in a little furrow, or cleft, near 
the head of the fish. 
The juice from which this beautiful colour origin- 
ates, is perfectly white during the time that it 
