CAN CELL ARIA. 



TESTA ovalis^ siibturrita^ anfractu ultimo ple- 

 ramqiie ventricoso. Apertura modo non integra^ 

 basi leviter caiialiculata^ nonnunquam in cana^ 

 lem brevem, reciirvam^ prodiicta ; labium exter- 

 num transverse sulcatum; internum expansum; 

 columella plicata^ plicis plerumque magnis^ com- 

 pressis. 



Though placed by Liniie among the Volutce and by Bru- 

 ^uiere among the 3TUrcE^ we do not think we are interfer- 

 jng with the labours of the Gentleman who is at present 

 engaged in developing the beauties and distinctions of those 

 two Genera, in so elegant and comprehensive a manner and 

 so much to the advancement of our favourite science; by 

 endeavouring to trace the characters peculiar to the present 

 Geims^ Canceilaria, of Lamarck. That Bruguicre should 

 have placed the shells belonging to this Genus among his 

 Mitrce would have appeared rather extraordinary to us, 

 did we not see also among the same Genus several others, 

 such as Marginclla, Columhella and Ancilla; for we think 

 (with Montfort) that the Cancellaria approaches much 

 nearer in natural affinity to Purpura^ though it is well 

 distinguished from that by the folds upon the Columella. 

 To some of the Turbinelli it approaches very nearly in 

 general appearance, and in the folds of the Columella, 

 but is distinguished from them by the transverse grooves 

 in the outer lip. 



The general form of the shells of this Genus is oval : 

 in most of them the spire is short, but a few species have 

 a lengthened spire : the last whorl being generally much 

 larger than the others and ventricose. Aperture not quite 

 entire, the lower part being always somewhat produced 

 into a canal, and that sometimes distinct but short and re- 

 curved ; the outer lip is transversely grooved within and 

 the inner lip is spread over the Columella and a portion of 

 the lower part of the last whorl: the Columella is plaited, 

 its folds are generally large, distinct and compressed, some- 

 times small and few, placed fkr within, so as to be scarcely 

 seen without breaking the shell; or very low upon the 

 Columella. Some of the species have distinctly varicose 



