220 VERTEBRATE REMAINS, PORT KENNEDY BONE DEPOSIT. 



by Merriam, and which seems to be common to all the existing species. The last 

 true molar is also more simple than in the existing species, consisting of a trigon 

 only, and lacking the heel. The heel is present in all the species of this genus, 

 of Crypt otis, Notiosorex and Sorex, according to Merriam. The m T and m^ have 

 the proportions and forms characteristic of the genus. The posterior extremity or 

 base of the large incisor falls below the trigon of the m T . The incisor has a strong 

 superior groove, which is well defined within as well as without. It has a convexity 

 of the external margin, beyond which it is broken off. 



Measurements. 



mm. 

 Length of molar series ; 5 



" ofm T ; 2.5 



Depth, ramus at m T ; 2 



CARNIVORA. 



URSUS Linn. 

 Ursus haplodon Cope (PI. XIX, fig. 2, 2a), Proc. Acad. Nat. Sci. Phil., 1896, p. 383. [Type No. 85, Mus. A. N. S.] 

 Arctodus pristinus Leidy, Cope, Proc. Am. Phil. Soc, 1871, p. 96, not of Leidy. 

 Arctotherium prist i man Leidy, Cope, Proc. Acad. Nat. Sci. Phil., 1895, p. 447. 



This species is one of the characteristic forms of the Plistocene fauna, not only 

 on account of its peculiarity but also on account of its abundance. The material 

 which has come under my observation is "as follows : — 



SPECIMENS. 



Wheatley Collection. 



Jaw fragments with teeth ; 3 



Academy Collection. 



Cranium crushed ; 1 



Both jaws together; 1 



Pre-maxilliaries with canines ; 1 



Maxilliaries , 3 



Mandibular rami; 8 



Superior incisors (separate) ; 3 



" canines " 3 



" molars " 6 



Inferior incisors '* 3 



" canines " 2 



" molars " 10 



44 



The above specimens may be supposed to belong to twenty-five individuals. 

 Besides them there are numerous disconnected bones of the skeleton. 



Ursus haplodon belongs to the American type of the Plistocene and present 

 ages, which is distinguished from the typical ursi by the greater development of the 



