37 
Mitra parva, 
TAB. CCCCXXX.—fig l. 
Spec. ChaR; Ovate fusiform, short, transversely 
sulcated ; upper edges of the whorls defined, 
entire; aperture elongated, lip plaited with- 
in; four plaits upon the columella. 
On ly a quarter of an inch long, and one-eighth wide ; 
the whorls are slightly convex, and smooth and shining 
between the sulci ; the upper sulcus is deeper than the 
others, and so produces a margin to the whorls ; the 
plaits within the lip reach nearly to the edge which is 
sharp. 
Mitra purnila. 
TAB. CCCCXXX.—fig. 2. 
Spec* Char. Ovate fusiform, short, trans- 
versely sulcated ; upper edges of the whorls 
defined, crenated ; sulci decussated by 
longitudinal costae ; aperture elongated ; lip 
plaited witliin;fourplaitsupon the columella. 
In every thing excepting the longitudinal costae, this 
agrees exactly with the last : these costae are numerous, 
not much elevated, and slightly curved ; they divide 
the sulci into regular square cells, and give a rough 
aspect to the shell. 
Many specimens of both the above Mitres have come 
to our hands through various channels from Barton 
Cliff. Amongst them we do not find any intermediate 
varieties. 
