INDEX TO THE GENERA AND SPECIES. 



Ill 



CEYPTA 



aculeata 



con tor ta 



costata ... 



unguiforruis 

 CEYPTOCONCHUS 



monticularis 



zealandicus 

 CEYPTODON,.. 

 CYCLINA 



kroyeri 

 CYLICHNA ... 



striata ... 

 CYPEJSA 



arabica 



eaput-serpentis . . 



punctata 



punctulata 



stercus-muscarum 



tessellata 



DAPHNELIA 



letourneuxiana . . 

 DAEINA 



pusilla ... 

 DENTALIUM 



pacificum 

 DIACHOEIS ... 



buskiana 



inermis... 



rnagellaniea 

 DILOMA 



nigerrima 

 DIMETOPIA ... 



cornuta 



spicata 



DlSCOPOEELLA 



liispida ... 



DOLIOLUM ... 



denticulatutn 



DOLITIM 



variegatum 

 DOEIS 



carinata 

 DOSINIA 



anus 



subrosea 



ELENCHUS ... 



dilatatus 



elegans ... 



iris 



purpuratus 

 EMAEGINULA 



striatula 

 EMMA 



crystallina 



tricellata 

 ESCHAEA 



flexuosa 



lichenoides 



Page 

 100 

 99 

 37 

 37 

 22 

 23 



94 



95 



95 



42 



42 



42 



93 



93 



8 



8 



10 



9 



8 



10 



9 



10 



10 



10 



8 



11 



8 



9 



9 



9 



11 



9 



10 



8 



40 

 40 

 40 

 76 

 76 



40 

 41 

 40 

 41 

 41 

 40 

 41 

 41 

 41 

 41 

 41 

 92 

 92 

 52 

 52 

 100 

 100 

 63 

 63 



