142 
MITRA scabra. 
TAB. COCCI 
Spec. Char. Ovato-fusiform, rough with de- 
cussating striae; lip thickened, with one 
obtuse tooth upon its margin. 
Syn. Buccinum scabriculum Br cinder, f, 20. 
Sharp, elevated, transverse striae, crossing many irregu- 
larly elevated undulations aftd lines of growth, render 
this a rough shell ; the principal folds upon the colu- 
mella are four, not very unequal in size ; above them are 
two slender ones, which however are often wanting : 
> the thick lip is remarkable, especially as it is so irregu- 
larly thickened, that the part opposite the two smallest 
plaits, is thinner than any other ; and immediately below 
it is so thick as to form a kind of blunt tooth : in this 
it agrees with Mitra monodohta of Lamarck, a very si- 
milar but smooth fossil : the apex of the spire consists 
of two smooth whorls, and is nearly globular, being the 
form of the shel! in the egg ; M. monodonta has the 
same conformation. When young the lip is thin. 
A common shell at Barton ; the Rev. T. Cooke 
favored me with the use of a particularly perfect speci- 
men, from which the larger figures are taken. It is 
very different from the Voluta (Mitra) scabriculum of 
Gmelin, to which Brander has referred. 
