112 



SHELLS AND SHELL-FISH. 



PART I. 



Analogies of the Genera of the VOLUTIN^J to the VOLU- 



TID^E. 



Genera of the 



VOLUTIN-ffi. 



f'oluta. 



Cymbiola. 



Harpula. 



rolutilithes. 

 Scaphella. 



Analogical Characters. 



f Shell ventricose, smooth; spire 7 

 I excessively short. 3 



Shellmuricated; spire lengthened. 

 CThe whole pillar covered with 7 

 i slender plaits. J 



f Aperture very effuse ; spire acute ; 7 

 i base of the pillar alone plaited. J 

 f Spire very short ; outer lip sinuo 

 < ated or detached above, and?- 

 C thickened internally. J 



Sub-families of the 

 VOLUTION. 



VOLUTINJE. 



MlTRINJE. 



OLIVIN^E. 



ANCELLAHIN.fi. 



So completely are the five sub-families of the Volu- 

 tidee thus represented by all the Lamarckian volutes, that 

 the analogical characters, or those common to both, 

 will almost serve to distinguish each, when joined to 

 the peculiar one which separates the two series. It 

 will be as well, however, to apprise the conchologist, 

 that the real type of the MitrincB is our genus Tiara, 

 and not that of Mitra, as formerly supposed. 



(103.) Having bestowed no ordinary labour in our 

 attempt to work out the natural affinities of the Muri- 

 cidce, we were curious to ascertain how that arrange- 

 ment would tally with the present. The result will 

 be seen from the following table: 



Analogies of the VOLUTID^E and the MURICIDJE. 



Sub-families of the 



VOLUTINjE. 



Valuta. 



Cymbiola. 

 Harpula. 

 Volutilithes. 



Scaphella. 



Analogical Characters. 



f Shell ventricose; spire remarkably 7 

 short. J 



f Shell muricated with spines or tu- 7 

 I bercles ; spire more lengthened, j 



. 



^ . 



J 



Buccinincc. 



r>, lrn , irina , 

 Purpunna. 



Spire often excessively lengthened. 

 f Aperture very effuse ; base of the 7 

 I pillar grooved or plaited. J 



C Outer lobe of the man tie much di-^ 

 < lated ; representing Marginella, > Nassincc. 

 (_ and consequently Nassa. j 



In this and the last set of analogies, we again have 



