PALEONTOLOGY OF THE BOULDER AREA 



I05 



Corbicula berthoudi 

 Corbicula cardiniasformis 

 Corbicula cleburni 

 Corbicula obesa 

 Corbicula macropistha 

 Corbicula planumbona 

 Corbicula subelliptica 

 Corbula crassatelliformis 

 Corbula subtrigonalis 

 Corbula tropidophora 

 Crenella elegantula 

 Cylichna volvaria 

 Cyrena holmesi 

 Dentalium gracile 

 Discinia sp. 



Fasiolaria cheyennensis 

 Faciolaria culbertsoni 

 Fusus sp. 



Glycimeris berthoudi 

 Goniobasis gracilenti 

 Goniobasis nebrascensis 

 Goniobasis tenuicarinata 

 Haminea ? occidentalis 

 Haploscapha capax 

 Inoceramus pertentuis 

 Lingula nitida 

 Liopistha undata 

 Lunatia subcrassa 

 Mactra canonensis 

 Mactra holmesi 

 Melanopsis americana 

 Mytilus subarcuatus 

 Neritina bruneri 

 Nautilus dekayi 

 Nucula cancellata 



Nucula planimarginata 

 Ostrea patina 

 Pachyma ? herseyi 

 Pecten sp. 

 Pholodomya sp. 

 Physa felix 



Placenticeras lenticulare 

 Protocardia rara 

 Protocardia subquadrata 

 Pseudobuccinum nebrascense 

 Pteria fibrosa 

 Pyrula bairdi 

 Scaphites cheyennensis 

 Scaphites conradi 

 Scaphites mandanensis 

 Serpula sp. 

 Spseriola cordata 

 Spasriola endotrachys 

 Spaeriola obliqua 

 Solemya bilex 

 Solemya subplicata 

 Solen sp. 



Tancredia americana 

 Tancredia coelionotus 

 Tellina equilateralis 

 Teredo sp. 

 Thetis ? circularis 

 Tulotoma thompsoni 

 Turritella sp. 

 Unio sp. 

 Viviparus leai 

 Viviparus prudentius 

 Volsella regularis 

 Yoldia evansi 



