WHITE ON PALEONTOLOGY. 

 FORT UNION GROUP. 



Valvata snhumhilicata Meek and 

 Hayden. 



Valvata parvuJa Meek and Hayden. 



Yiviparus raynoldsiamis Meek and 

 Hayden. 



Viviparus leidyi Meek and Hayden. 



Yiviparus trochiformis Meek and 

 Hayden.* 



Vivipariis pemdiaris Meek and Hay- 

 den. 



Viviparus retusus Meek and Hay- 

 den. 



Viviparus leai Meek and Hayden. 



Campeloma imdtistriata Meek and 

 Hayden. 



Hydrohia antJionyi Meek and Hay- 

 den. 



Hydrobia warrenana Meek and 

 Hayden. 



Hydrobia f euUmoides Meek. 



Mycropyrgus minutulus Meek and 

 Hayden. 



Goniohasis nebrascensis Meek and 

 Hayden.* 



Goniobasis tenuicarinata Meek and' 

 Hayden.* 



Cerithidea (PireneUa) nebr ascends 

 Meek and Hayden. 



Tliamnastus limiuvformis Meek and 

 Hayden. 



CoJumna teres Meek and Hayden. 



Columna vermicula Meek and Hay- 

 den. 



BuJinusf rhomboideus Meek and 

 Hayden. 



Bulinus longiusctdus Meek and Hay- 

 den. 



Limncca {PleuroUmncea) tenuicostata 

 Meek and Hayden. 



Planorbis {Bathyomplialus) plano- 

 convexus Meek and Hayden. 



Acroloxus minntus Meek and Hay- 

 den. 



WIND RIVER GROUP. 



EeJix? re^erna Meek and Hayden. 



Macrocyclis spatiosa Meek and Hay- 

 den, 



WHITE RIVER GROUP. 



Cypris leidyi Evans and Shumard. 



Helix leidyi Hall and Meek. 



Physa secalina Evans and Shumard. 



Limncea nebrascencis Evans and 

 Shumard. 



Limncea meekiana Evans and Shu- 

 mard. 



Limncea sliumardi Meek. 



Limncea diaphana Evans and Shu- 

 mard. 



Planorbis veiustus Meek and Hay- 

 den. 



Planorbis leidyi Meek and Hayden. 



Planorbis nebrascensis Evans and 

 Shumard. 



The following species are from Tertiary strata, at dififerent localities, 

 in the great Eocky Mountain region, which have not yet been correlated 

 with any of the groups of the foregoing catalogue. These fossils are of 

 unusual interest, because of the fact that they comprise types which 



See foot-note on page 110. 



