llN!VFR8ITy np IMIwniS 
riB 4 1920 
AI’TEKODON- MACROGNATIIUS. 231 
M. 8501. Distal end oi: right huiuorus. Figured on PI. XIX. figs. 7,7 a. (dosely similar to 
C. 0445. 
M. 8440. Distal ends of two similar humeri. 
C. 8845. Hight tibia, wanting the epiphyses (text-fig. 75). The bone, as a whole, is strongly 
curved, the convexity being anterior. The cnemial crest (cn.) slopes away and 
probably its upper end was overlapped by the patella. It extends about halfway down 
the bone, and terminates in a rugose prominence for the attachment of a powerful 
muscle. The upper half of the shaft is trihedral. On the inner face just below the upp(‘r 
end there is a long roughened depression for muscle-attachment (m.). The ])ostei-ior 
face at the upper end of the bone is concave from side to side. Towards the distal end 
the shaft widens out a little, but in this specimen the articular region is wanting. On 
the whole, this bone seems to lend some support to the idea that this Creodont may have 
Text-fig. 76. 
rui 
liight astragalus of (?) Ajyterodon macrogmithm : A, from above ; B, from below. 
cal., facet for calcaneum ; ect., ectal facet : /., astragalar perforation ; fib., surface for fibula ; nau., facet for 
navicular; sus., sustentaciilar facet ; <t5., surface for tibia. Xat. size. ^ 
been more or less aquatic in its habits. The well-marked rugose surface for the 
attachment of muscles at the inner side of the proximal end of the shaft (in.) seems to 
occur also in some Seals and in Lutra, while that marked m' in the figure may 
correspond with a somewhat similarly situated rugosity in some Seals. The dimensions 
(in centimetres) of this bone are : — 
Length 1 .5-4 
Width of proximal articulation .3-7 
Antero-posterior width of shaft at muscular prominence . . 2-5 
M. 9258. Plaster cast of the above specimen. Made in the lintish Mnseiun. 
C. 8116. Bight astragalus (text-fig. 76). The trochlear surface (ti5.) is very slightly grooved ; on its 
inner side it is produced backwards in a sort of tongue to the extreme hinder border. 
At the angle between the outer edge of this backward extension and the posterior border 
of the outer half of the trochlea is the large upper opening (/’.) of the astragalar canal. 
