606 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



measurement is 70 mm. The distal half of the humerus from Christ- 

 mas Lake (Cat. No. 3817) measures across the articular surfaces 96 

 mm. ; in the dromedary, 77 mm. At a distance ol 150 mm. above the 

 lower end of the inner condyle the fore-and-aft diameter is 68 mm. ; 

 the side-to-side diameter, 59 mm. The fore-and-aft width of the 

 inner condyle is 108 mm.; in the dromedary, 86 mm. The fossa for 

 the olecranon is more deeply excavated than in the dromedary, and 

 it is relatively narrower — 33 mm. 



There is in Russell's collection a complete right hinder cannon 

 bone (U.S.N.M., Cat. No. 3824). The total length is 380 mm.; 

 that along the outer border, 369 mm. The width across the proximal 

 articular surface is 70 mm.; the fore-and-aft diameter at the middle 

 of the length, ignoring the groove, 42 mm. ; the side-to-side diameter, 

 40 mm. The width across the distal end is 90 mm.; across the 

 divisions, 42 mm. The hinder face of the bone is occupied by a broad 

 groove. It is doubtful whether this bone belongs to the largest 

 camel found in that region. There is, however, another and larger 

 right hinder cannon bone which lacks about the distal third. The 

 fragment, measured , along the outer border, is 290 mm. long. The 

 length originally was not far from 435 mm. The width of the upper 

 articular surface is 70 mm.; the side-to-side diameter, at about the 

 middle of the length of the bone, 45 mm. The inner border of the 

 hinder groove is higher than in the other bone just described. It is 

 probably to be referred to the very large camel of the Christmas 

 Lake region. 



In a small lot of bones which were collected many years ago at 

 Washtucna Lake, Washington, by the late Dr. George M. Sternberg, 

 are three foot bones of a very large camel. These consist of a right 

 astragalus, the distal end of an anterior cannon bone, a first phalange, 

 and a second phalange. These parts may have all belonged to the 

 same animal. On the catalogue they have the number 9717. The 

 astragalus is a large one. The length on the outer face is 96 mm.; 

 in the dromedary, 77 mm. The width at the lower end is 70 mm.; 

 in the dromedary, 51 mm. The cannon bone presents about 135 

 mm. of the lower end. This bone is compared in the following 

 table with the corresponding one of the dromedary Camelus drom- 

 edarius : 



Measurements of anterior cannon bones in millimeters. 



Width of distal end, ignoring the split 



Width of each articular surface 



Anteroposterior thickness of each division 



Width of shaft above lower end at distance equal to width of distal end. 

 Thickness at same level 



