524 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 48. 



In his report of the cruise of the steamer Corwin, published in 

 1881, on page 24, Hooper wrote as follows in speaking of his visit 

 to Elephant Point: 



I searched the face of the cliff at Elephant Point for fossil remains, but 

 found none either in the ice or in the soil above it. I was more fortunate, how- 

 ever, on the beach below after the tide fell. There I found a large number of 

 mammoth bones and tusks and some smaller bones belonging, probably, to the 

 " aurock " and musk ox. 



Although the skull here described was not specifically mentioned, 

 it is probable that it was included in among the " smaller bones." 



The specimen (pi. 31, fig. 1) consists of the horn-cores practically 

 complete and the parietal and frontal bones which bore them. The 

 supraoccipital region is missing, also the whole of the floor of the 

 brain case and the bones of the jaws. Of the orbits, only the upper 

 and hinder part of the rim of the left one is preserved. The frontals 

 do not extend as far forward as the notch for the hinder ends of the 

 nasals. Many important measurements are therefore not to be ob- 

 tained. The following are given: 



Measurements of the skull of Bootlierium mricolens in millimeters. 



Width at notch between orbits and horn-cores at the lower border of the 



latter 126 



Width at the rear of the orbits, estimated 185 



Least distance between exostoses of horn-cores on forehead 100 



Distance between exostoses at rear of horn-cores 140 



Transverse diameter of brain case 90 



Thickness of parietal bone at about its center 46 



Fore and aft diameter of base of horn-core 63 



Vertical diameter of base of horn-core 58 



Circumference of base of horn-core 200 



Length of hom-core on hinder curve 205 



Length of chord of anterior curve of horn-core 165 



Distance between the extremities of the horn-cores 466 



The rear of the upper surface of the specimen extends backward 

 a distance of 75 mm. behind the line which joins the hinder borders 

 of the bases of the horn-cores, and it must have reached the occipital 

 crest. The hinder end of the skull, at the level of the parieto- 

 squamosal suture must have had a width of close to 105 mm. In 

 getting the width of the skull between the orbits and the base of 

 the horn-cores in Ovibos one measures at the middle of the height of 

 the hom-core or even higher. In the specimen of B. nivicolens it is 

 necessary to descend to the lowest point of the base of the core, for 

 from this point upward the skull narrows. 



The base of the horn-core is nearly circular in section, the upper 

 surface being only slightly flattened. At about the middle of the 

 length the horn-core is still flattened, the fore-and-aft diameter being 



