128 PLEISTOCENE MAMMALIA. 
CHAPTER XIII. 
Carpus, Pl. XX, figsed; 1’, 273,45) 5)'b:: 
CONTENTS. 
§ 1. Seaphoido-lunare. | § 2. Pisiform. 
a, Description. a. Description. 
B. Measurements. 
§ 3. Uneiform. 
a. Description. 
B. Measurements. 
y. Definition from that of Ursus. 
8. Measurements. 
In describing the bones of the carpus we shall consider the anterior or dorsal surface 
as that which is naturally so in all quadrupeds; the palmar and inferior or posterior as 
synonyms denoting the same portion of the bone. 
The carpus in the genus Felis is composed of seven bones, besides the small one which 
has no independent existence in human anatomy, called by Straus-Durckheim the ‘ phacoid.’ 
The scaphoido-lunare, the cuneiform, and pisiform, compose the upper or proximal row ; 
the trapezoid, the trapezium, the magnum, and unciform, the lower or distal. Of these we 
have only met with the scaphoido-lunare, the unciform, and pisiform, in Felis spelea. 
1. Scaphoido-lunare (Pl. XX, figs. 1, 1’, 2).—1 a. Description —The scaphoido-lunare is 
by far the largest and most important bone in the carpus; it extends throughout the whole 
width of the joint, and forms almost the sole means of attachment between the fore paw and 
the forearm. It is very massive and is roughly quadrangular in plan, with a large and strong 
tubercle projecting from the postero-internal angle (fig. 1’, e) ; it is broader than long, and 
much thicker externally than internally. ‘The proximal or radial articulation (figs. 1, 
2, a, 6), which covers the whole of that surface of the bone with the exception of that 
portion which is opposite the tubercle is convex, traversed intero-posteriorly by a depres- 
sion (figs. 1, 2, 4) running from behind forwards and inwards. On its external edge is a 
very small articulation for the upper edge of the pisiform, which just touches it at that 
point (figs. 1, 2, ¢). 
The tubercle (fig. 1’ e) is a somewhat pyramidal or conical mass, projecting diagonally 
