100 BUCCINID.E. 



Sub-Family PISANIIN^E. 



PISANIA, Bivona. Shell oblong; spire prominent, whorls smooth or 

 spirally striated ; canal very short ; outer lip thickened and crenated. 

 Operculum ovate, nucleus apical. 



EUTHRIA, Gray. Shell fusiform, smooth ; aperture oval, produced 

 anteriorly into a long recurved canal ; inner lip simple ; outer lip poste- 

 riorly sinuated, striate within. Operculum ovate, nucleus apical. 

 Dentition, PI. 27, figs. 27, 28. 



METULA, H. and A. Adams. Shell elongately fusiform, finely cancel- 

 lated; spire elevated, acute; aperture narrow; inner lip distinct, smooth; 

 outer lip thickened externally, crenulated within, emarginate poste- 

 riorly. Operculum unknown. Dentition, PL 26, fig. 21. 



CANTHARUS, Bolten. Shell bucciniform, more or less ventricose in the 

 middle, narrowed anteriorly ; spire and aperture nearly equal ; colu- 

 niella generally with a few transverse ridges; outer lip internally 

 crenated, and with a superior siphonal canal. Operculum ovate, nucleus 

 apical. Dentition, PI. 26, figs. 22, 23 ; PI. 27, fig. 26. 



Sub-Family BUCCINI1SLE. 



BUCCINTJM, Linn. Shell ovate or oblong, covered with a horny epider- 

 mis ; spire elevated, apex acute ; aperture large, oval, emarginate in 

 front ; canal wide, very short, or a mere oblique truncation of the base 

 of the aperture ; columella smooth ; inner lip expanded ; outer lip 

 usually thin, smooth internally. Operculum ovate, nucleus small near 

 the outer front edge. Dentition, PI. 27, figs. 29, 30. 



NEOBUCCINUM, E. A. Smith. Shell bucciniform, smooth, thin ; aper- 

 ture obliquely, widely notched below. Operculum subspiral. Den- 

 tition resembling that of Neptunea.* 



BUCCINOPSIS. Jeffreys. Shell bucciniform, smooth or spirally striu- 

 late, last whorl inflated ; aperture obliquely truncate below. Operculum 

 small, subtriangular, nucleus apical. Dentition, PI. 27, fig. 32. 



VOLUTHARPA, Fischer. Shell ventricose, thin ; spire short, body-whorl 

 and aperture very large. Operculum usually wanting ; when present, 

 at first with apical nucleus, afterwards becoming annular. Dentition, 

 PI. 27, fig. 31. 



* Mr. Smith founds his genus principally upon the paucispiral opercu- 

 lum, but the figure given by him shows an operculum which is no more 

 curved than occurs sometimes in the genus Sipho, for example. This, 

 with the dentition indicates relationship with J^eptunea, but the absence 

 of canal in the shell on the other hand, relates it to Buccinum. 



