:;ss 



of the radial convexity, intervenes between this and the two distal concave articular 

 surfaces for the trapezoides (ib. z) and magnum (ib. m) respectively ; whence the non- 

 articular tract is continued upon the radial extension of the bone, w hich terminates in 

 the convexity for the trapezium (ib. t), such articular surface being very small and 

 forming the apex of the scaphoid. This part of the scapho-lunar is similar to the 

 scaphoid in the Orang 1 . Between the radial convexity and the magnal concavity 

 there is a narrow smooth tract adapted to the hinder and upper border of the unci- 

 form (//). Behind and below the ulnar end of the radial convexity is a slightly convex 

 surface for the cuneiform : in the front or anconal view of the carpus this articulation 

 is not seen. 



The cuneiform (ib. ib. c) is a comparatively small bone, with a concavity on its 

 proximal surface for the " styloid process " of the ulna (ib. 55), and a smaller and less 

 deep articular surface for the " head " of the pisiform (ib. p). The distal surface of 

 the cuneiform presents a large undulate articular surface for the unciform ; and its 

 backward extension just reaches the scapho-lunar. The pisiform (ib. ib. p) is clavate, 

 articulated by a sort of condyle to the outer proximal cup of the cuneiform ; it then 

 loses thickness and gains breadth, and expands to a broad subtruncate end. The bone 

 projects backward and is twisted out of place to show its form in figure 10. The tra- 

 pezium (ib. t) is small, just touches the tips of the scapho-lunar, and offers a small 

 surface for part of the base of the broad metacarpal of the pollex (1.). The trapezoid 

 (ib. z) is still smaller, is wedged between the scaphoid (s) and magnum (m), and offers a 

 surface to the outer (radial) part of the proximal articular surface of the second meta- 

 carpal (11.) The magnum (ib. m) is the next carpal of the distal row in point of size : 

 it is wedged between the scapho-lunar and unciform, and articulates with the ulnar half 

 of the proximal surface of the second metacarpal (11.), and with a larger portion of that 

 of the third metacarpal (in.). The unciform, equalling in size the scapho-lunar, here 

 occupies the position in the wrist held by the unciform and intermedium 2 in the Orang. 

 It accordingly articulates by its proximal surface with the scapho-lunar and cuneiform, 

 and by its distal surface with the magnum and the fourth and fifth metacarpals. But 

 in the Kangaroo it also offers a surface to the ulnar angle of the base of the third 

 metacarpal. 



§ 5. Bones of the Hind Limbs. — The pelvis in Kangaroos is remarkable for its size, 

 especially its length, and for the strength of the long prismatic columnar ilia. The 

 length from the " crista ilii" (PI. LXXI. fig. 1, c) to the distal end of the ischio-pubic 

 >ymphysis (ib. h'), in Macropus rufus, is 1 foot ; from the crista (c) to the fore part of 

 the acetabulum (£) is 5 inches 4 lines : this gives the length of the ectiliac surface 

 (ib. 62) 3 , which has an oblique haemal and outer aspect, and is concave both lengthwise 

 and transversely, but it does not exceed an inch in breadth. The neural surface 



' See ' Anat. of Vertebrates,' vol. ii. p. 541, fig. 361, a. 3 g & h in fig. 361, op. cit. 



3 Answering to tho "internal ilrac fossa" of anthropotomy. 



