174 
Tl-:i!TIAKY VEKTEin?ATA OE THE FAYCM. 
it; lias four roots. 717. 2 is bilojiliodoiit ; it is soinewliat longer tlian broad. 71f. 3 
(IM. X\'1I. tig. 0) is also liilopliodout, with a talon; tlic anterior crest is slightly 
concave forwards, the shorter posterior one nearly straight. 'I'here seems to have 
bemi a small accessory cus]) in the valley between the main crests, and another on 
tiu' anterior border of the tooth; in Avear these become united with the inner ends 
of the ])osterior and anterior crests respectively. There are only four roots to this 
tooth, the ])ostero-internal one being enlarged to support the talon. 
Fore Lioih . — The scopala (PI. XA"1I. tigs. !J, 0 a) is not completely known, the best 
s[)('cimen wanting the upper jiortion. The prcscapular fossa is very small, the post- 
scapular large and regularly concave from side to side. The spine (s.) commences 
some distance above tiie glenoid surface and rises very rapidly; its greatest height, so 
lar as pi’cservcd in the specimen here described and figured, is about 7 '5 cm. The 
coracoid biu’der {c.h.) is thin and sharp above, but thickens rapidly below% wdiere it 
])asscs into the great tuberous coracoid process [cor.). This seems to he larger than 
in any other mammal, forming a massive hook-like process overhanging the glenoid 
cavity, the articular surface of which appears to have been continued for a short 
distance on its posterior face. ()n its inner side it is raised into a prominent ridge, 
se])ai-atcd fi om the border of the glenoid cavity by a groove. The glenoid border 
is marked off from the actual edge of the glenoid cavity hy a slight notch, above 
which it is thickened and rounded, thinning, how’ever, very rapidly upwards. The 
large glenoid cavity proper (f/.c.) is nearly circular in outline, but, as already mentioned, 
the ai ticular surface is continued foiavards on the coracoid process ; the articular 
surface (tig. 9 a) is nearly flat from side to side and concave from before backwaxrds. 
The dimensions of this scapula are given belowu 
TVo specimens of the htnnerm are known, one, though otherwise imperfect, exhi- 
biting the whole length, wdiile tlie other (PL XVII. figs. 7, 7 a) includes the distal 
three-quarters of the bone in almost perfect condition with exception of the 
articular surface. The chief peculiarity of this humerus is the enormously massive 
distal extremity, the condyles especially being greatly developed. 'The trochlear 
surface is divided into two nearly equal portions by a comj)aratively shallow^ groo\'e 
which runs obliquely outwards and forwairds, so that tlie articulation appears some- 
what oblique. There is a very large and deep coronoid fossa {e.f.) and a deep though 
much smaller and more shar[)ly defined olecranon fossa (o/.f.), but the two do not 
ap|)ear to have communicated with each other. The outer condyle (o.c.) is a great 
mass of Ijone, of which the jxostcrior flattened surface forms the outer waill of 
tlu^ olecranon fossa. The outer face is also flattened and looks outwairds and 
dowunvards. From its n])per end the supinator ridge (.s\r.), forming a ])rominent crest, 
runs u])W'ards and backw ards. Tlie inner condyle (7. e.) is also very prominent ; below 
it seems to be separated from the trochlea by a deep notch; anteriorly it is hollowed 
into a pocket-like fossa which is sharply defined hy a jiromincnt ridge below% hut above 
passes gradually into the antero-internal face of the shaft. The deltoid crest (i/.) 
