246 ■ MR. BUSK. ON THE EEMAINS OF 



l"-25 ; external 1"-15 ; and anterior 0"'75, and 0"-5 on either side of the radial ridge. 

 The anterior aspect of the remaining portion of the shaft presents at the upper part a 

 very deep and spacious radial fossa, from which is prolonged obliquely downwards and 

 inwards a shallow uneven sulcus, about 0"-6 wide, the outer border of which is formed 

 below by the prominent ridge, the situation of which is indicated by the letter (r) in the 

 accompanying figiu-e, which is intended to show the outline of the transverse section of 

 the shaft at a distance of about 3"-6 below the middle of the 

 radial sulcus, or at a distance equal to about twice the trans- 

 verse diameter of the internal condyloid facet. The external 

 surface of the bone is smooth and concave above, slightly 

 convex below; the internal is also very smooth, even, and 

 nearly flat below, passing above into a rather deep sulcus be- 

 tween the inner articular head and the base of the olecranon. 

 The posterior angle is very acute, but above it is broken ob- 

 liquely off'. The internal angle is thick and rounded, and 

 the external rounded and slightly carinate. 



4. A second well-marked fragment of the ulna is shown in fig. 25. It is the olecranonr 

 process of the left ulna. Anteriorly it exhibits nothing but an irregularly fractured 

 .surface, and no vestige of the articular surface. It is also slightly broken on the inner 

 face, and below it is fractured transversely 3" below the summit. The ap. d. of the 

 upper end, measured at a point where the bone is entire, on the outer side of the 

 median line, is about 2"; but it doubtless projected considerably in front of this in the 

 median line when entii'e. In size, colour, and general condition this fragment closely 

 corresponds with the one just described, and it may probably be regarded as belonging 

 to the opposite ulna of the same individual. 



5. A third portion of a left ulna, corresponding in dimensions with the above, is also 

 contained in the collection. Though clearly referrible to the same species, it would 

 seem to have belonged to a younger animal ; and as it is a good deal injured, apparently 

 by recent fracture, it is needless to enter into any particular description of it. 



If we compare the characters of tlie ulna of E. melitensis as displayed in the specimens 

 above described, with those of the same bone in E. africanus, very considerable differ- 

 ences, besides mere size, will at once be perceived. 



(1) Avery striking dissimilarity exists in the form and proportions of the articular sur- 

 face. In an ulna of the African Elephant 31" long, the transverse diameter of the 

 upper articular end is 7"- 6 ; the tr. d. of the inner facet measured from the middle 

 of the radial sulcus 4"-l, and its ap. d. 3"-l ; whilst the length of the outer facet is 

 .8"-4, and its width 2"-l. 



These dimensions of the facets therefore, as compared with the transverse diameter 

 of the articular head, taken at I'OOO, in the respective cases, stand thus : — 



