1916] Nomland: Fauna from the Lower Pliocene 



203 



Diplodonta parilis (Conrad) 

 Dosinia jaealitosana Arnold 

 Grlycimeris coalingensis Arnold 

 Glycimeris septent-rionalis (Mid- 



dendorf ) 

 Maeoma baltica (Linne) 

 Maeoma jaealitosana Arnold 

 Maeoma nasuta (Conrad) 

 Maeoma secta (Conrad) 

 Maeoma vanvlecki Arnold 

 Metis alta (Conrad) 

 Modiolus rectus Conrad 

 Monia maehroschisma (Deshayes) 

 Mulinia densata Conrad 

 Mytilus coalingensis Arnold 

 Mytilus kewi, n. sp. 

 Ostrea atwoodi Gabb 

 Pandora punctata Conrad 

 Panope generosa Gould 

 Paphia jacalitosensis Arnold 

 Paphia staminea (Conrad) 

 Paphia tenerrima (Carpenter) 

 Paphia, n. sp.? 



Gastropoda 



Astralium arnoldi, n. sp. 

 Calliostoma coalingensis Arnold 

 Calliostoma kerri Arnold 

 Calyptraea filosa (Gabb) 

 Caneellaria, cf. tritonidea Gabb 

 Chrysodomus coalingensis, n. sp. 

 Chrysodomus imperialis Dall 

 Chrysodomus portolaensis (Arnold) 

 Crepidula adunca Sowerby 

 Crepidula princeps Conrad 

 Fieus nodiferous Gabb 

 Fissuridea subelliptica, n. sp. 

 Margarita johnsoni Arnold 

 Murex perangulatus, n. sp. 

 Nassa calif ornica (Conrad) 

 Natica (Neverita) reeluziana Petit 

 Natica (Neverita) orbicularis, n. sp. 



Pecten estrellanus Conrad, var. 



terminus Arnold 

 Peeten (Hinnites) giganteus 



(Gray) 

 Pecten oweni Arnold 

 Pecten wattsi Arnold 

 Periploma, cf. argentaria Conrad 

 Phacoides annulatus (Eeeve) 

 Phacoides richthofeni (Gabb) 

 Sanguinolaria nuttalli Conrad 

 Saxidomus nuttalli Conrad 

 Schizothaerus nuttalli (Conrad) 

 Siliqua lucida (Conrad) 

 Solen sicarius Gould 

 Spisula albaria (Conrad) 

 Spisula coalingensis (Arnold) 

 Spisula hemphiili (Dall) 

 Tellina aragonia Dall 

 Tivela trigonalis, n. sp. 

 Yoldia cooperi Gabb 

 Zirphaea, cf. dentata Gabb 



Olivella biplicata Sowerby 

 Purpura turris Nomland 

 Sinum scopulosum Conrad 

 Thais kettlemanensis Arnold 

 Thais lamellosa (Gmelin) 

 Trophon coalingense Arnold 

 Trophon magister, n. sp. 

 Trophon, cf. carisaensis F. M. 



Anderson 

 Turris (Bathytoma) carpenteriana 

 (Gabb) 



Turris (Bathytoma) coalingensis 



(Arnold) 

 Turris (Bathytoma) tryoniana 



(Gabb) 

 Turritella nova, n. sp. 



Cirbipedia 



Balanus, cf. concavus Bronn 

 Tamiosoma, cf. gregaria Conrad 



Some of the forms in the Jacalitos fauna listed above warrant further 

 discussion. Astrodapsis jacalitosensis Arnold, which has been thought 

 characteristic of the middle Jacalitos, has been found within 200 feet 

 of the top of the beds mapped by Arnold and Anderson. Pecten oweni 



