TURTLES OF JUDITH RIVER FORMATION 63 



The types of two species came from south of Woody Mountain, 

 Assiniboia, in beds referred to the "Lignite Tertiary" by Dawson, 

 Cope, and others, but are now considered to belong to the Lance 

 formation. They are: 



Plastomenus coalescens 



Plastomenus co status 

 From Long Lake, North Dakota, in beds of the Lance formation, 

 the following types are supplied: 



Compsemys obscura 



Compsemys victa 

 The types of two species were obtained from the Lance formation 

 of Converse County, Wyoming: 



Baena hatcheri 



Aspideretes beecheri 

 The remaining species is Basilemys ogmius which as already 

 shown is of mixed position. Strictly speaking the type came from 

 near Milk River, Alberta, in beds that are probably younger than 

 the Judith River, while B. variolosa, the "species" with which it 

 has been combined, came from the Judith River formation near 

 Judith River, Montana. 



A further analysis of the evidence adduced indicates that the 

 following species should be excluded from the Judith River fauna 

 on the sufficient ground that they do not occur in beds of this age : 



Trionyx vagans 



Plastomenus costatus 



Plastomenus punctulatus 



Plastomenus insignis 



Baena hatcheri 



Compsemys obscura 



Compsemys victa 

 To return again to the five species having their type locality in 

 Judith River and Belly River beds, it appears that the four follow- 

 ing have never been found outside the Judith River or Belly River 

 horizons. 



Basilemys imbricarius 



Polythorax missouriensis 



Baena antiqua 



Neurankylus eximius 



