194 — Mr. MoxTacv's Account of some new and rare 
from the Gmelinean Anomia vitrea, as it has neither the hyaline 
nor glossy appearance which that species is said to possess, nor 
has it the internal midrib in the lower valve, which Chemnitz's 
figure bespeaks, and which seems to have been drawn from a 
specimen in his own cabinet. 
Upon the whole, I cannot liken the present subject to any 
species so nearly as to the Mullerian Terebratula Cranium ; and 
there is the greater probability that it really is that shell, when it 
is considered that the distance is not great between Zetland and 
the coast of Norway, where Muller's shell was found. 
I trust I shall be excused for having been thus diffuse on so 
interesting an acquisition to the catalogue of British ‘Testacea. 
l was enticed to this by the opportunity of examining and com- 
paring a recent Terebratula containing the animal, with that of 
Anomia, and from that comparison I have been induced to adopt 
the judicious division of Muller. 
TuRBO ZETLANDICUS. 
Tas. XIII. Fig. 3. 
Shell with five tumid volutions, furnished with spiral ridges ; 
which are decussated with longitudinal elevated strize, that rise into 
angular tubercles at the points of decussation ; at the base of the 
shell the spiral elevations are very prominent, and destitute of strize: 
the apex is obtuse; aperture nearly orbicular and marginated. 
Length two lines: the colour is white. 
This very elegant little shell is another new species, for which 
we are indebted to the researches of the Rev. Mr. Fleming, who 
found it on the shore of the isle of Noss in Zetland ; a situation 
which has been little explored with a scientific eye. From this 
quarter many of the marine productions described by Muller and 
ther northern continental writers may be expected, especially in 
2 the 
