174 DE. B. BROOM ON THE STEUCTUEE AND [June 4, 



The centrale (c.) is a rounded, moderate-sized element, which 

 occupies the centre of the carpus. It articulates with the radiale, 

 intermedium, and probably with ulnareof the proximal carpal bones, 

 and with the 1st, 3rd, and 4th carpalia of the distal series. It is 

 possible that a small second central element may have lain between 

 the centrale and the ulnare, but I regard this as improbable. 



The 1st carpale is a short flattened bone which iits in between 

 the radiale and the 2nd carpale. On its outer end it gives an 

 articulation to the pollex. Its inner end articulates with the 3rd 

 carpale and the centrale. 



The 2nd carpale is a very small bone which articulates with the 1st 

 and 3rd carpalia, and supports the metacarpal of the 2nd digit, 

 and possibly shares with the 1st carpale the support of the 1st 

 metacarpal. 



The 3rd carpale is a fair-sized element which fits in between the 

 2nd and 1st carpalia, the centrale, and the 4th carpale, and gives 

 articulation to the 3rd metacarpal. 



The 4tli carpale is a large quadrangular element. Distally it 

 gives articulation to the 4th metacarpal and to a slight extent to 

 the 3rd and 5th metacarpals. Proximally it articulates with the 

 centrale and the ulnare, and fits in between the 3rd and 5th carpalia. 



The 5th carpale is very small, and is so closely articulated to the 

 4th carpale as to render it not improbable that the two elements may 

 be anchylosed as age advances. In the little skeleton, which is 

 probably immature but not very young, the two elements are quite 

 distinct. The little 5th carpale articulates also with the ulnare, 

 and gives articulation to the 5th metacarpal. 



Metacarpals and Phalanges. 



In the raanus there are five well-formed digits, but I fail to 

 detect any trace of a praepoUex. The three median digits are 

 somewhat stronger than the other two. 



Of the pollex only the metacarpal and part of first phalanx are 

 preserved. The metacarpal is a small rectangular bone about as 

 broad as long. The 1st phalanx is probably very similar. 



In the second digit, as in the first, only the metacarpal and a 

 portion of the 1st phalanx are preserved. The metacarpal is a fair- 

 sized element appreciably longer than broad. In the middle it is 

 somewhat constricted, and at its distal end considerably expanded. 

 The 1st phalanx was probably considerably smaller than the 

 metacarpal. 



The third digit is complete except the ungual phalanx. The 

 metacarpal is very similar to that of the 2nd digit, but somewhat 

 larger. Like the latter, it is constricted in the middle and 

 expanded distally. The 1st phalanx is a quadrangular bone 

 only slightly longer than broad, and slightly constricted in the 

 middle. It is about one-half smaller than the metocarpal. The 

 2nd phalanx is very similar in shape to the 1st, but still smaller. 



The fourth digit is almost perfect. The metacarpal is about 

 equal in size to that of the 3rd digit, but is less constricted in the 



