168 
SPECIFIC 
decide so nice a point for better judges than him- 
self, the author has ventured to follow his own 
conviction, and to figure the specimen under the 
title of a Buccinum. His reasons for doing so 
have been, — that the canal is perfectly distinct, 
following the revolutions of the whorls, — and that 
this conformation is not to be found in spiral 
Patellse, but precisely resembles that of Buccinum 
patulum, from^which the present species appears 
to be removed but a single gradation in any one 
respect. At any rate it answers the intended 
object, which was to exemplify a doubtful shell, 
for the exercise of the learner. 
Fig. 2. Mu REX dentatus. 
Shell obovate, caudate ; whorls of the spire 
striate ; apex produced very smooth ; columella 
three-plaited . 
Lister Cofich. Tab. 815. Fig. 25. 
Specimen white with bands of small reddish 
and ochraceous parallelogramic spots ; whorls 
transversely undulate, crowned ; apex cylindrical ; 
three upper circumvolutions solid ; aperture white, 
smooth. 
