TERTIARY VERTEBRATA OF THE FAYtM. 
:^30 
(hiltoid crest (</.) is enormously developed, forming the strongly convex sharp anterior 
edge of three-fourths of the length of the shaft. The supinator ridge (s.r.) is greatly 
denadoped as a sort of scroll-like flange which ]u-ojects very strongly backwards 
as well as outwards. The inner condyle (he.) is very })rominent, and there is an 
entepicondylar foramen {en.f.). The coronoid fossa is small and shallow ; the olecranon 
fossa is also small, but sharply delined ; there is no supratrochlear perforation. The 
distal articulation consists of a prominent inner ])ortion, [)rojecting below the rest of 
the surface, a gently rounded intercondylar ridge, and a narrow outer surface deeply 
notched distallv as in Liitra. On the whole, this humerus is very like that of fAitra and 
Text -fig. 75. 
A. B 
Right tibia of (?) Apierndon n>acro(/natJtvs, lacking ej)iphyses : A, from inner side; B, from trout. 
v)i.. cnemial crest ; ?a., ?//.', deep impressions for muscle-attachments. ] nat. size. 
still more like that of Potaviotlu'r'mvt, so that it is pos.sible that the animal to which it 
belonged may havi^ lived a semiuupuitic lif('. Tln^ dimensions (in centimetres) ot this 
sp(*cimen are : — 
liengtli (from top of great trochanter) -] 
Width of ])roximal end 5'8 
„ middle of shaft (from side to si(ie) I'd 
.. „ ,, (from before backwaril.' ) .... d'S 
., distal end b'5 
,, „ articulation t'- 
H. 9257. ria.^tei' cast of the above specimen. 
l/(o/i' //I th(' liiillsh Mii.seuui. 
