TURTLES OF JUDITH RIVER FORMATION 59 



10. Polythorax missouriensis Cope. 



Type locality: Judith River Basin, Montana, in beds of the Ju- 

 dith River formation. It has not been reported from any other 

 locality or horizon. 



11. Baena antiqua Lambe. 



Type locality: Red Deer River, Alberta, British America, in 

 beds supposed to be of Belly River age; it has not been obtained 

 elsewhere. 



12. Baena hatched Hay. 



Type locality: South side of Lance Creek, opposite mouth of 

 Dogie Creek, Converse County, Wyoming, in beds of the Lance 

 formation ("Ceratops beds"). 



A specimen from the Belly River beds of the Red Deer River, 

 Alberta, was referred to this species by Lambe, 20 and it was upon 

 this ground that it was included by Hatcher 21 in the Judith River 

 fauna. Later, however, Doctor Hay 22 referred Lambe's specimen 

 to a totally different genus and species (Boremys pukhra), and 

 hence Baena hatcheri is to be eliminated from the Judith River 

 fauna. 



13. Neurankylus eximius Lambe. 



Type locality: Red Deer River, Alberta, British America, in 

 beds regarded as of Belly River age; it is monotypic and has not been 

 collected elsewhere. 



There is one naive bit of history connected with this genus that 

 should not be omitted. Doctor Hay in his Fossil Turtles of North 

 America (p. 93) remarks as follows: "Mr. Lambe placed the genus 

 provisionally among the Chelydridae, but as no genera of this family 

 are known from deposits older than the Tertiary and as the type has 

 some resemblance to the Baenidae, which flourish at that time, it 

 seems better to refer Neurankylus to this family until more is known 

 about it." 



20 Cont. Canadian Pal., vol. 3, 1902, pt. ii, p. 43. 



21 U. S. Geol. Surv., Bull. 257, p. 79. 



22 Fossil Turtles of North America, 1908, p. 92. 



