MIT RA fulva. 
i 
Specieic CHARACTER. 
Shell ovate-acute, smooth, fulvous, unspotied, marked with trans- 
verse sulcated striz, containing punctured dots: body whorl 
contracted ; suture crenated: base obtuse: outer lip thickly 
and strongly crenated ; the crenations, and the plaits on the 
pillar, white. 
ae 
Tue different nomenclature of Lamark and Dillwyn, in- 
duced us to suspect that our present species might still be 
retained under the name of adusta; but asa greater degree 
of confusion may perhaps arise in so doing, than that which 
we wished to avoid, we have now given it a distinct name, 
and defined its true characters. it is sometimes partially 
dotted with pure white. ‘The M. adusta of Lamark is, in 
short, the same as the ruffina of Linneus: or at least that 
species which Dr. Solander and Mr. Dillwyn conceive to 
be such. Our shell is from the Isle of France, and is not 
common : the crenated teeth on the lip are very strong; the 
base obtuse, and effuse: the spire and aperture of equal 
length. 
—>—_. 
MITRA _ ambigna. 
Shell ovate-fuciform, rufous, with a white band near the suture, 
transversely striated and punctured, suture and outer lip cre- 
nated, base contracted ; spire shorter than the aperture. 
Less distinctly striated and punctured than the last ; but 
differs considerably in being almost a fuciform shell: the 
base of the aperture is consequently contracted. We pos- 
sess but one specimen, and know not its locality. 
—f>—_ 
MITRA _ punctata. 
Shell ovate, brown, striated and punctured: spire very small, some- 
what conic: outer lip crenated: pillar six-plaited. 
A beautifully perfect shell of this new and very rare 
species, we procured from our friend Mrs. Mawe; we 
have never seen another: the inside of the lip is margined 
with deep brown. 
Mitra. Pl. 3. 
