DESCRIPTION, 
175 
PLATE XXVII. 
Fig. 1. Turbo madr'eporoides. 
This shell, if such it be, was lately sold with two 
others of the same description, at the sale of Lord 
Bute’s collection, and was purchased by Mrs. 
Mawe. The species was brought originally, it is 
believed, from the coast of Africa, by Captain 
It is certainly extremely doubtful even to what 
Order this curious specimen belongs. Upon a 
minute examination of its external characters, and 
of such internal parts as have been perforated by 
marine insects, we need not hesitate to pronounce 
what it is not; what it really is, must still remain 
to be determined. The calcareous matter of which 
it is composed seems to be agglutinated in a dif- 
ferent manner from that of Madrepores and Corals, 
to which it bears the most remarkable resemblance. 
The olive-green spots, which are often raised above 
the yellowish white surface, appear of the same 
construction with it, and are not regularly stellated, 
or more deeply pored. The arms are solid, and 
penetrated with the green colour in spots through- 
