me. ST. GEOEGE MIYAET ON THE SKELETON OE THE PEIMATES. 
423 
generally very short; neck of femur all but obsolete; peroneal trochanter very small, some- 
times smaller than the tibial one, which is always large ; scarcely any distinct third 
trochanter ; head of femur more or less compressed ; rotular surface very shallow ; 
tibia with a strongly marked process overhanging the fossa for the tibialis anticus ; 
facet of tibia for outer condyle very convex antero-posteriorly ; tibial malleolus pointed, 
curved, and compressed, and sometimes springing rather from the front than from the 
side of the tibia; groove for flexor longus hallucis very marked; groove for flexor 
longus digitorum separated from the others by a strong process ; surface of tibia for 
astragalus with its long axis directed antero-posteriorly ; patella small and rounded ; os 
calcis less, or but little more, than one-twentieth of the length of the spine ; tuberosity 
of os calcis small and much inflected ; naviculare very short antero-posteriorly (Plate 
XIV. fig. 10) ; hallux reaching beyond the middle of the distal phalanx of the index. 
LOEIS. 
For the characters of this genus see above, “ Exceptional forms.” 
NTCTICEBUS. 
Proportion of supra- to infraspinous fossa very small ; anterior margin of scapula 
uniformly concave (Plate XI. fig. 6) ; a supracondyloid foramen ; olecranal fossa imper- 
forate; peroneal trochanter not rising so high as the summit of the head of the femur, 
which is extremely compressed; pit for ligamentum teres enormous; condyles project- 
ing about equally backwards. 
PEEODICTICUS. 
Posterior vertebral angle of scapula very obtuse (Plate XII. fig. 1) ; angle of spine 
of scapula with axillary margin very open ; proportion of supra- to infraspinous fossa 
largo ; anterior margin of scapula with a slight prominence in its middle, otherwise 
straight ; anterior vertebral angle very well defined ; spine of scapula approaching axil- 
lary margin and glenoid surface more closely than in Loris ; shaft of humerus much 
curved ; a remarkably deep pit for the insertion of the infraspinatus ; supinator ridge 
very strongly marked ; external condyle, as it were, much extending the distal articular 
surface of the humerus ; a large supracondyloid foramen ; olecranal fossa imperforate ; 
internal condyle large, truncated ; an extra ossicle beneath (i. e. palmad to) carpus 
(Plate XIV. fig. 5), and another beneath tarsus ; pollex much exceeding index in length, 
and reaching to the middle of the third digit ; index with only two phalanges ; tube- 
rosity of ischium rather more everted than in Loris, and not approaching spine of 
ischium so nearly ; peroneal trochanter projecting strongly forwards, and a little peronead 
beyond the shaft of the femur ; tibial trochanter a wide flat process, sometimes larger 
than the peroneal one ; only a faint impression of the ligamentum teres on femur ; inner 
condyle projecting back more than the outer one; peroneal malleolus very large and 
massive ; hallux attaining to nearly the middle of the distal phalanx of the index. 
