1918] Stock: The Pleistocene Fauna of Hawver Cave 



513 



Measurements of Fourth Metatarsal, no 19875 



Greatest length 1 



Greatest width of proximal end 



Greatest depth of distal end a 



Greatest width of distal end 



Least depth of shaft 



106.7 mm. 



49 

 a67.7 

 40 



25 



a, approximate. 



No. 19889 (figs. 32a, 32i, 32c) is a rather poorly preserved ungual 

 phalanx of the median digit of the pes. It is distinctly smaller than 

 the corresponding phalanx of Megalonyx jeffcrsoni. The median 

 ridge of the proximal articulating surface is very thick, and the 

 proximal end of the phalanx ahove this ridge is deeply depressed. 



EUCERATHERIUM COLLINUM ( ?) Sinclair and Furlong 

 A right and a left superior molar, no. 21467 and no. 21468 respec- 

 tively, indicate the presence of this peculiar bovid form, occurring 

 so characteristically in the Pleistocene faunas of Potter Creek Cave 

 and Samwel Cave in Shasta County. The range of this genus during 

 the Pleistocene is thus extended some 150 miles to the southward in 

 the foothill belt of the Sierras. With the exception of these occur- 

 rences in fissure deposits of California, Euceratherium is unknown 

 from other Pleistocene faunas 23 of the state. This is noteworthy and 

 suggestive particularly of those deposits representing faunas of the 

 plains. Euceratherium seems then to be restricted in its range to 

 mountainous or at least hilly country as already suggested by Sinclair 

 and Furlong. In discussing the habitat of this form, Sinclair and 

 Furlong 24 state as follows : "It is not probable that an animal of such 

 size and weight was confined to the higher summits like the sheep 

 and goats, but rather, as the specific name suggests, frequented the 

 lower hills." 



As stated by Sinclair and Furlong, the dentition of Euceratherium 

 closely approaches that of Ovibos. The median external style in 

 superior molars of Euceratherium tends to be more acute than in 

 Ovibos. The molars from Hawver Cave agree with Euceratherium 

 in this respect as well as in their size. On the whole the superior 



23 An incomplete horn in the palaeontological collections of the University of 

 California apparently of Eueeratheriuvi, was secured a number of years ago from 

 the Klamath River in Siskiyou County, California (loc. 3346). 



24 Sinclair, W. J., and Furlong, E. L., Euceratherium, a new ungulate from 

 the Quaternary caves of California, Univ. Calif. Publ., Bull. Dept. Geol., vol. 3, 

 p. 416, 1904. 



Ungulata 



