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U.S. NATIONAL MUSEUM BULLETIN 287 



Cerastoderma 

 blakeanum 

 chipolanum 

 coosense 

 druidicum 

 fucanum 

 pansatrum 

 phlyctaena 

 taeniopleura 

 taphrium 

 waltonianum 



''Ceratobornia 



'Ceratophorus 



■'Ceratozona 



Ceres 



nelsoni 



Cerion 



agassizii 

 anodonta 

 brunneum 

 canonicum 

 drupium 

 floridana 

 incisum 

 inconspicum 

 lacunorum 

 niteloides 

 northropi 

 obesum 

 oweni 

 pineria 

 plegmatum 

 pupilla 

 reticulatum 

 rhyssum 

 saurodon 

 stevensoni 

 variabile 

 vermiculum 

 watlingense 

 Cerithiella 



producta 

 Cerithioderma 



pacifica 

 Cerithiopsis 

 acontium 

 ara 



burkevillensis 

 crystallina 

 diagona 

 excelsus 

 floridana 

 georgiana 



martensii 



matara 



movilla 



pesa 



pupa 



sassetta 



scariphus 



sigsbeana 



silicata 



stejnegeri 



taeniolata 



truncatum 



vicola 

 Cerithium 



burnsii 



callisoma 



caloosaense 



chipolanum 



coccodes 



cookei 



corallicolum 



cymatophorum 



degeneratum 



eutextile 



glaphyrea 



halense 



heilprini 



insulatum 



litharium 



mascotianum 



milium 



ocalanum 



platynema 



plectrum 



silicifluvium 



stantoni 



vaginatum 



vaughani 

 *Ceritoturris 



bittium 

 '''Ceropsis 



minima 

 *Cetoconcha 



albida 



bulla 



elongata 



malespinae 



margarita 



scapha 



smithii 

 *Cetomya 



elongata 



microdonta 

 Chaetopleura 



gemma 



lactica 

 Chama 



agassizii 



caloosana 



chipolana 



draconis 



hendersoni 



inermis 



lactuca 



lyelli 



phonea 



tampaensis 



willcoxi 

 Chamelea 



craspedonia 



rhodia 



spada 

 Cheila 



dry as 

 Chemnitzia 



abseida 



acosmia 



actopora 



aepynota 



approximata 



garrettiana 



houseri 



hypolispa 



infantula 



kelseyi 



montereyensis 



muricatoides 



paramoea 



raymondi 



santarosana 

 Chicoreus 



burnsii 



leeanus 



micromeris 

 Chione 



bainbridgensis 



ballista 



bisculpta 



burnsii 



chipolana 



craspedonia 



erosa 



glyptocyma 



hendersonii 



mazyckii 



obliterata 



pertincta 



purpurissata 



