FELIS SPELAA. 131 
CoMPARATIVE MEASUREMENTS. 
Felis spelea. Felis leo. F. tigris. 
Taunton Museum. 
F g g 
= 5 x 5 =| =| a = a 
re. | vee 3 3 = = 
a= oles $s S aa a 
| 3 zc a 4 
n 
US oO B95)  U9Ze) 180 77 29°} 1:52) 155 
2. Minimum circumference ............2.............. 2-LOs) 2210) |) 2°00) 1-905) 1:35) |S AGS OMe IGSs 
3. Transverse measurementof proximalarticulation | 1:05 | 0°95 | 0-96 | 0:93 0°95 
4 Weinh (orl Glee CaMan a an i 0°50") 07535) 10-505 043 0°46 Sen 
5. Transverse measurement of distal articulation | 1:00 | 1:00 | 0°82 | 0°74 | 0:75 | 0°80 | 0°75 
POMBE UIGAIN CATON toa aeu sa aciecaide «<s aaccha vic oases | 0°75 | 0°75 | 0°76 | 0°50 | 0°35 | 0°43 | 0°44 
§ 3. Unciform (figs. 5, 5’) a. Description—The unciform of Felis spelea is a small, 
somewhat wedge-shaped bone, not distinguishable from that of the recent Lion and Tiger 
except by its massiveness. The head of the wedge occupies the anterior or dorsal aspect 
of the bone, and a very slight tuberosity is the only trace of the claw-like process which 
gives the name to the bone in man. 
The proximal or scaphoidal articulation (fig. 5, 2) is much narrower than the distal, 
the sides being nearly parallel. It is much longer from front to back than broad ; convex 
anteriorly and slightly concave posteriorly, it ends on the palmar surface in a semicircular 
boundary. ‘he distal or metacarpal articulation (figs. 5, 5’, 6) partakes of the wedge- 
shape of the bone. It is deeply concave, and receives the heads of the fourth and fifth 
metacarpals. The inner articulation (figs. 5, 5’, c) for the magnum is shaped something 
like the letter L, placed so that the stem coincides with the anterior edge of the bone. 
It is nearly flat. The remaining articulation, or the cuneiform (figs. 5, 5’, d), is for the 
most part slightly convex, and occupies the anterior part of the external surface. The 
anterior or dorsal surface assumes the form of an irregular pentagon (fig. 5), roughened 
and indented between the lateral articulations for the attachment of several interosseous 
ligaments. The thin end of the wedge, occupying the palmar surface, is a tubercle 
(fig. 5’, e) for the attachment of the adductor of the fifth digit; the opponens of the same 
digit not being attached, as in man, to this bone, but to the magnum. 
This bone strongly resembles that of the Bear, but is easily distinguished by the greater 
squareness of the latter, as well as by the flatter distal articulation. We know of no other 
bone with which it can be compared. 
