MR. ST. GEORGE MIYART ON THE SKELETON OF THE PRIMATES. 
415 
HYLOBATES. 
Pectoral limb about twice the length of the spine ; entire pelvic limb scarcely more 
than three-fourths of the length of the pectoral one ; angle of spine of scapula, with 
axillary margin, about 12° or 15°; angle of glenoid surface, with the same, about from 
93° to 105° ; proportion of supra- to infraspin ous fossa very large ; spine ending consi- 
derably nearer the posterior than the anterior end of the vertebral margin, which margin, 
however, it scarcely attains ; axillary margin nearly straight ; supraspinous fossa largely 
exceeding the infraspinous one at the glenoidal end of the spine ; glenoid surface rounded 
and shallow; clavicle more than one-quarter the length of the spine ; acromial horizontal 
curve of clavicle almost obsolete ; humerus somewhere about three-fourths of the length of 
the spine, and approaching three times that of the scapula; head of humerus very glo- 
bular ; tuberosities very small, and much below the summit of the head of the humerus ; 
radius more than four-fifths of the length of the spine ; metacarpal of pollex about one- 
tenth of the length of the spine ; an os intermedium ; cuneiforme articulating directly with 
the ulna ; metacarpals increasing markedly (in length and in extension distad) from the 
fifth to the second ; pisiforme long but slender ; trapezium with a rounded convex arti- 
cular surface for metacarpal of pollex ; ilio-pectineal eminence very large ; subpubic groove 
generally distinct ; symphysis pubis very long ; tuberosities of ischium large and flattened 
beneath; shaft of femur very straight ; trochanteric fossa deep ; external condyle project- 
ing back much less than the internal one ; tibia more than half of the length of the spine ; 
hallux reaching to the middle or more of the proximal phalanx of index ; metatarsal of 
hallux more than one-tenth of the length of the spine. 
SnimLE OTHER THAR THE SIMIDLE. 
Proportion of whole pectoral limb to spine, at 100, from about 91 - 7 to about 121-3; 
pelvic limb always longer than pectoral one ; angle formed by the vertebral and axillary 
margins of the scapula from about 50° to about 75° ; spine of scapula always reaching its 
vertebral margin ; anterior vertebral angle not well defined ; spine grooved behind at its 
base ; surface for teres major much marked ; acromion often not nearly so high as cora- 
coid ; coracoid very short and bent in towards glenoid surface (Plate XI. fig. 3) ; anterior 
margin of scapula much more than half of the length of the axillary margin (Plate XI. 
fig. 2) ; clavicle less than one-fifth of the length of the spine ; humerus less than half of the 
length of the same; deltoid surface much marked (Plate XII. fig. 4); external condyle 
pressed forward and, as it were, flattened against capitellum ; styloid process as large as, 
or larger than, the distal end of the shaft of the bone ; manus less than one-third of the 
length of the spine; often a process extending backwards from the proximal end of the 
fifth metacarpal; an os intermedium; cuneiforme joining ulna directly; pisiforme 
large ; crest of ilium short ; no subpubic groove ; tuberosity of ischium large and always 
flattened beneath ; greater part of cavity of acetabulum visible when outside of ilium 
is looked at ; femur longer than humerus ; outer condyle of nearly the same size as the 
inner one ; hallux always with two phalanges. 
