150 SHELLS AND SHELL-FISH. 



Analogies of the Conin^e, or Cones. 



Genera of the Annlniriro Sub-families of 



CONIN.E. Analogies. Strombin*. 



CoNUs. Spire short, smooth. Typical. Conine. 



CoRONAXis. Spire coronated or nodulous. Strombinje. 



Terebellum. ? CeRITHINvE. 



COXORBIS. [ ^SjSip.'^ "'^^ ^' '"'" '"^ '^] Pl-^^HOTOMIN^ 



CoNELLA. Outer lip striated internally. Colum belling;. 



The third analogy, not being apparent in the shells, 

 probably may be traced in the animals. But this is not 

 very material, since the whole arrangement is founded 

 upon affinities, and aU the other analogies are perfect. 



(140.) The CoLUMBELLiN^, or dove-shells, although 

 of a small size, rather smooth, and without any dilation 

 of the outer lip, have, nevertheless, very much the 

 aspect of little wing-shells ; this impression originates 

 in the thickened angle or hump on the upper part of 

 the outer lip ; a character which is seen in no other 

 group but that of Strombidea, and in certain MarginellcB, 

 — both which, in fact, are legitimate representatives of 

 Columhella. According to Guilding, the animals of 

 this group, like that of Conus, have the operculum so 

 very small as often to escape detection. 



(141.) The result of an attentive analysis leads us 

 to arrange the whole of these shells under the five fol- 

 lowing genera : — 1. We retain the name of Columhella 

 to the C. mercatoria, and the other European species, 

 where the crenated teeth of the reflected inner lip ex- 

 tend its whole length, and are regularly graduated, 

 those on the inner being but slightly developed. 2. In 

 Pusiostoma, the teeth on both sides of the aperture are 

 much more developed ; those on the outer Hp are 

 crowded, very thick, and only occupy the middle por- 

 tion. Both these, but particularly the last genus, have 

 the top of the lip so gibbous, as to form a prominent and 

 even projecting angle : they constitute the sub-typical 

 and the typical groups, and consequently exhibit the 



