126 PLEISTOCENE MAMMALIA. 
proximal end of the tibia in Felis, but passes upwards to the external face of the condyle 
of the femur. 
In fig. 4 we have represented the distal end of a left fibula which resembles in. every 
respect, save that of size, the corresponding portion of the leonine or tigrine bone. It 
presents externally a deep groove between two tuberosities, which, in the living animal, is 
converted by a ligament into a canal for the tendon of the peronzeus longus (fig. 4, a). 
The posterior tuberosity forms the external malleolus, behind which is a second groove 
(fig. 4, c), deep and narrow, for the tendons of the peronai brevis and tertius. Internally 
we find a small concave articulation close to the epiphysial division, by which the bone is 
attached laterally to the tibia, and below this is a flat surface which articulates with the 
outer side of the astragalus, and behind this, again, is a depression for one of the ligaments 
which bind the fibula to the tarsus. 
From the immature state of the shaft we have been unable to institute a rigid com- 
parison between it and those of the recent Feles. 
Dr. Schmerling* gives a rough and slight figure of a portion of a fibula, and states in 
the text that the upper portion is broken away ; his figure, therefore, must be that of the 
external and posterior aspect of the distal end, together with about two thirds of the 
shaft; with this exception, we have met with no figure of the bone. 
§ 2 B. Measurements.—In the following table the superior massiveness of the 
spelzan fibula is shown over those of the Lion and Tiger. 
ComparaTIVE MEASUREMENTS. 
Felis spelea. Felis leo. F, tigris. 
Taunton Museum. : : 
8 =I 
Fy 5 
2 : 
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Pc ee: = = 
se igeg) F | a | a 
53 |Sau nd 4 
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Bam | moe | = = 
<> 
ee Vaximnmylene tig cat tericcacee eae teat ie ae TTS ise Leb ie OO 
2. Minimum circumference ......................-...- 1:25 a 0°85 eT, 110 
3. Transverse measurement of proximal articulation |... sh; 0°35 075 | 0-45 
AmAVEUt Cali GIttOg 3 Meme ko codes ook ery hue td ye ne ee Son 1°30 1°30 1:05 
5. Transverse measurement of proximal articulation Sie 0°65 0°60 0°57 1°50 
Gh Distal ditto iste oy). cease ce sone ee Siete 5} 1:10 1:26 0°45 
| 
! 
1 “Oss. Foss, de Lidge,’ vol. ii, pl. xvi, fig. 4, p. 80. 
ese eS 
a Se 
