THE MANUS. 



[CHAP. 



remain functional, with long ungual phalanges cleft me- 

 sially at their extremities. The third is longer than the 

 second, and this longer than the fourth. In Choeropus 

 the second and third remain, and retain their relative 

 size, though comparatively longer, more slender, and 

 with smaller ungual phalanges. The fourth digit is 



u 



FIG. in. Bones of manus of Bandicoot IG. 112. Bones of manus of Chccropit 

 (Perameies), X 15. castanotis, X 2. 



rudimentary, but with the normal number of phalanges ; 

 the first and fifth are entirely suppressed. The carpal 

 bones have their normal relations, but the trapezium is 

 exceedingly reduced. 



Order MONOTREMATA. In the Echidna the carpus is 

 short and broad, and has a very complex articulation 

 with the distal ends of the radius and ulna. The first row 



