CHAP. IV. PRIMARY DIVISIONS^ THEIR ANALOGIES. 99 



very large, but the mantle not lobed or reflected. 

 {fig. 6.)* 



(88.) These primary divisions having long been ad- 

 mitted by all writers, we shall at once compare them 

 with those of the predaceous Zoophaga. 



Analogy of the Volutid^ and the Zoophaga. 



Analogies. 



Sub-families of the 

 Volutida. 



Families of the 

 Zoophaga. 



VOLUTINA. 



Olivine. 



Ancillarin^. 



MARGINELLINiE. 



isively^ 

 trun- > 



Foot of the animal excessively' 

 large ; base of the shell 

 cate. 



[VolutincE and Cassince.) 



rFoot small, not so long as the^ 



) shell, the base of which is con- r 



L tracted. 3 



{Mitrirue and Scolymus.) 



C Spire very short ; tip papillary ; 7 

 \ pillar plaited. i 



Spire nearly or quite concealed. 



f Outer lip detached and thick- 7 

 X ened. j 



MuricidcE. 



TitrhinellidcE. 



VoluttdeB. 



Cyprceidce. 



Strombida. 



Thus, the truncated and wide-mouthed helmet-shells, 

 among the Muricidre, find their prototypes in the melon 

 volutes; and the muricated mitres, in the sub- typical 

 TurhinellidcE, with which they also agree in their fu- 

 siform shape. The Olivince correspond to the typical 

 volutes, in having their foot excessively large. The ani- 

 mal of Ancillaria is unknown ; but, from the high polish 

 of the shells, we may suppose it is analogous to the 

 cowries. Lastly, the Mai-gineUinai are clearly proto- 

 types of the StromhidfB, as they are the only volutes 

 which have the top of the outer lip detached from the 

 body-whorl. 



(89.) The weakest point in the foregoing table is 

 that, perhaps, which relates to the AncUlarice ; but, by 

 comparing the family with the Cassidce, the station of 

 this group will be more clearly shown. 



* The annexed cut is from one of the unpublished drawings of Guilding : 

 tlie shell is j)ure white. 



H 2 



