17 



Actaeouidae. 



547. Solidula attenuata, ]\[eel- <j- Ilaydcn. I^. 



54 \ Solidula biplicata, ((7a/;?() J/eei. N. j. 



549. Solidula [?] bullata, {Morton) Gahh. N. j. 



550. Solidula lenta,Co;!m'/. Miss. 



551. Solidula Mortoni, (Forbes) Gahh. N. j. 



552. Solidula Riddelli, Shumard. Tex. 



553. Solidula subelliptica, Meek ^- Hayden. Dak. 



554. ActcBon cretacea, Guhh. ]\-, j, 



555. Actceon modicella, Conr. Miss. : Ala. 



556. Acteeon ovoidea, Gahh. N. j. 

 5 7. Acteeon texana, Shumard. Tox. 



558. Actceonina texana, (Roemer) Gahb. Tex. 



559. Bullopsis cretacea, Conr. Miss. 



560. Globiconcha coniformis, Roemer. Tex. 



561. Globiconcha curta, Gahh. N. j. 



562. Globiconcha elevata, Shumard. Tex. ; lud. T. 



Subclass PROSOBRANCHIATA. 



Order CYCLOBRANCHIATA. 



?I>eiitaIidae. 



563. Dentalium fragile, Meek ^- Ilayden. Dak. 



504. Dentalium gracile, IlaU ij- Meek. Dak. 



505. Dentalium nanaimoense, Meek. Vane. I. 



506. Dentalium pauperculuni. Meek <|- Hayden. Dak. 



567. Dentalium subarcuatum, Conr. N. J. 



Patellidae. 



568. Helcion [?] tentorium, {Morton) D'Orb. N. J. 



Tectiiridae. 



569 



570 



Anisomyon alveatus, Meek ^^ Hayden. Id. 



Anisomyon borealis {Morton) Meek <^ Hayden. Dak. 



571. Anisomyon Haydeni, Shumard. Tex. 



572. Anisomyon ? inaequicostatus, (Shumard) Meek. Tex. 



573. Anisomyon patelliformis, Meek tf- Hayden. Id. 



574. Anisomyon sexsulcatus. Meek ^- Hayden. Id. 



575. Anisomyon Shumardi, Meek i^-Uayden. Dak. 



576. Anisomyon subovatus, Meek Sf Hayden. Id. 



577. Tectura ? occidentalis, {Hall S; Meek) Meek. Dak. 

 57'^. Tectura ? papillata, Meek <J- Hayden. Dak. 

 579. Tectura ? parva, Meek Sf Hayden. Dak. 



2 



