168 SPECIFIC 



decide so nice a point for better judges than him- 

 self, the author has ventured to follow his own con- 

 viction, and to figure the specimen under the title 

 of a Buccinum. His icasons for doing so have 

 been, — that the canal is perfectly distinct, follow- 

 ing the revolutions of the whorls, — and that this 

 conformation is not to be found in spiral Patellae, 

 but precisely resembles that of Buccinum patulum^ 

 from which the present species ap|)ears to be re- 

 moved but a single gradation in any one respect. 

 At any rate it answers the intended object, which 

 was to exemplify a do2ihtful shell, for the exercise 

 of the learner. 



Fig. 2. MuREX dentatus. 



Shell obovate, caudate ; whorls of the spire stri- 

 ate ; apex produced very smooth ) columella three- 

 plaited. 



Lister Cojich. tab. SI 5. fig. 25. 



Specimen white with bands of small reddish 

 and ochraceous parallelogrammic spots ; whorls 

 transversely undulate, crowned; apex cylindrical; 

 three upper circumvolutions solid ; aperture whitCj 

 ^(nooth. 



