92 



FOSSIL TURTLES OF NORTH AMERICA. 



Boremys pulchra Lambe. 

 Figs. 88, 89. 



Ba'ena hatcheri, Lambe, Geol. Surv. Canada, Contrib. to Canad. Palaeont., Ill (4 to), pt. 2, 1902, p. 43, 



fig. 8. 

 Ba'ena pulchra, Lambe, Ottawa Naturalist, XIX, 1906, p. 187, plate iii, fig. 4; pi. iv. 

 Boremys pulchra, Lambe, Ottawa Naturalist, XIX, 1906, p. 232. 



The type of the present species belongs in the collection of the Geological Survey of Canada. 

 It, together with at least one other specimen, was collected by Mr. Lawrence M. Lambe, of the 

 Survey, from beds belonging to the Belly River series, equivalent to the Judith River beds. The 

 locality is the mouth of Berry Creek, on the Red Deer River, Alberta. The type consists of 

 the anterior half of the carapace and the complete plastron. The other specimen furnishes the 

 anterior portion of the carapace only. Through the kindness of the discoverer of the species the 

 writer lias had the opportunity of examining it. 



Fig. 88. Boremys pulchra. Carapace of type. 



1 



From Lambe's figure. 



pren, preneural; jw, supramarginal scutes. 



The specimen was originally referred to Ba'ena hatcheri for the reasons that it was not then 

 generally accepted that the Judith River formation was distinct from the Laramie, that the 

 specimen is somewhat crusht, that it resembles in various ways B. hatcheri; and for the reason 

 finally that the presence of the supramarginals was then overlookt. The broader front of the 

 carapace was noted and caused some hesitation. The presence of the supramarginals and 

 the small preneural makes the separation of the species as the type of a new genus justifiable. 



The type specimen was a rather small individual, having close to three-fifths the length of 

 the type of Ba'ena riparia and a little more than one-half that of B. hatcheri. The carapace 

 (fig. 88) had a length of about 195 mm. It is doubtful whether the width has been increast 

 by the crushing to which it was subjected. 



The front of the carapace is considerably broader and more rounded than that of B. 

 hatcheri. The neurals, so far as preserved, appear to differ in no important respect. The 

 first appears to be transversely divided into two parts. The anterior portion is to be regarded 

 as a preneural, such as is seen in Chisternon. The shortness of the nuchal bone is remarkable. 

 Whereas, in B. hatcheri and other specimens of Ba'ena which reveal the sutures, the nuchal has 

 about the same fore-and-aft length as the first neural, in Boremys pulchra the nuchal is not 

 one-half as long as the neural. Its width is about 4 times its length. 



