FORT UNION OF CRAZY MOUNTAIN FIELD, MONT 



33 



below this more definite fossil horizon but (as far as observed) onl^ 

 within a few inches of it. The level is about 125 or 150 feet below 

 the base of the No. 3 sandstone. Some additional remarks on the 

 occurrence of fossils here are made in discussing the facies and ecology 

 of the quarry fauna. 



Table 1 gives a complete list of the fossils so far identified from the 

 Gidley and Silberling Quarries, with the number of upper and of 

 lower jaws of each species, based on the National Museum collection 

 only except Elpidojphorus minor, the one specimen of wliich is in the 

 Princeton Collection. It is probably, but not quite sureh^, from the 

 Silberling Quarry. 



Table 1. — Fossil mammals so far identified from the Gidley and Silberling Quarries, 

 Crazy Mountain Field, Mont. 



Species 



Gidley Quarry 



Upper 

 jaws 



Lower 

 jaws 



Silberling Quarry 



Upper 

 jaws 



Lower 

 jaws 



Multitubeeculata: 

 Ptilodontidae: 



Ptilodiis montanus 



fPtilodus douglassi 



tPtilodus gidteyi 



fPtilodus sindairi 



Ptilodus sp 



fEciypodus grangeri 



tEciypodus russetti 



fEciypodus silberlingi 



fPareclypodus jepseni. 



Eucosmodon sparsus 



Insectivora: 



7Deltatlieridiidae: 



Oetastops parous 



Leptictidae: 



Prodiacodon concordiarcensis. 



Leptacodon ladae. 



Leptacodon munasculum 



Myrmecoboides montanensis.. 

 Nyctitheriidae: 



StUpnodon stmplicidens 



Pantolestidae: 



Bessoecetor dilucuti 



Aphronorus fraudator 



Mixodectidae: 



Eudaemonema cuspidata 



ElpidophoTus minor 



Picrodontidae: 



Picrodus silberlingi 



Primates: 



Plesiadapidae: 



Pronothodectes mattheici 



Carpolestidae: 



Elphidotarsius florencae 



?Anaptomorphidae: 



Paromomys maturus 



Paromomys depressidens 



Palaechthon alticiispis 



Patenochtha minor 



39 



