III. ON TWO SPECIES OF TURTLES FROM THE 

 JUDITH RIVER BEDS OF MONTANA. 



By O. p. Hay. 



Professor J. B. Hatcher has placed in the hands of the writer three 

 specimens of fossil turtles, which were collected during the year 1903 

 in the Judith River beds of Montana. These are found to belong to 

 two species, which have not hitherto been described. They are as 

 follows : 



ASPIDERETES BEECHERl Hay. 



Trionyx foveatus, Baur, G., Proc. Acad. Nat. Sci. Phila., 1891, p. 

 418 (not of Leidy). 



The type of this species belongs to the collection of the Peabody 

 Museum, Yale University. It was collected in the Laramie beds of 

 Converse County, Wyoming, in the year 1889, by Prof. J. B. Hatcher 

 and the late Dr. Charles E. Beecher. It is a nearly complete indi- 

 vidual, lacking few parts, except the head and most of the neck. A 

 description of it, accompanied by illustrations, will shortly appear in 

 the American Journal of Science. Although the two specimens be- 

 longing to the Carnegie Museum are from the more ancient Judith 

 River beds, the writer is unable to discover any characters to distin- 

 guish them from the Laramie specimen. Of these Judith River speci- 

 mens one, number 445, has had a length of about 375 mm. The 

 other, number 541, is smaller. Both were collected on Fish Creek. 

 Montana. 



Baena callosa sp. nov. 



The type of this species bears the number 330 of the Carnegie 

 Museum Catalogue. It was collected on Willow^ Creek, Montana. 

 It consists of an imperfect carapace and the greater portion of the 

 plastron. 



Of the carapace there is present about the anterior three fourths ; 

 but of this most of the peripherals and portions of the costals are miss- 

 ing. The sutures between the various bones appear not to have been 

 obliterated, but the preservation is such that it is impossible to trace 

 them satisfactorily. Most of the anterior border of the nuchal has been 



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