418 
MR. ST. GEORGE MIVART ON THE SKELETON OE THE PRIMATES. 
greater than in Ateles ; anterior margin much more than half the length of the axillary 
one, and with a deep notch sometimes converted into a foramen ; spine at its glenoidal 
end coming close to axillary border ; clavicle nearly one-fifth of the length of the spine ; 
tuberosities of humerus small and decidedly below its head ; no supracondyloid fora- 
men ; pollex always with two phalanges ; tuberosity of ischium approaching slightly 
nearer to the spine of the ischium than in Ateles (Plate XIII. fig. 1) ; peroneal trochanter 
larger than in that genus, and rising above the summit of the head ; pit for ligamentum 
teres of moderate size ; outer condyle much smaller than the inner one ; hallux not 
reaching quite so far forwards, with regard to the index of the pes, as does the pollex 
with respect to that of the manus. 
CEBITS. 
Scapula much like that of the lower Simiidse, but trapezoid ridge very prominent and 
sharply defining the suprascapular notch ; spine transverse and grooved behind at its base ; 
spine at its glenoidal end coming close to axillary margin ; surface for teres major very pro- 
minent ; clavicle much less than one-fifth of the length of the spine ; sternal horizontal 
curve of clavicle less marked than in Lagothrix and Ateles ; tuberosities of humerus 
almost rising to a level with the summit of its head ; bicipital groove and deltoid surface 
very marked ; a distinct supracondyloid foramen ; radius and ulna much curved ; styloid 
process of ulna long, but not like that of Ateles ; pisiforme large ; trapezium sometimes 
with a very slight distal concavity; tuberosity of ischium rounded; anterior inferior 
(superior anterior) spinous process of ilium disguised by the projection of the anterior 
(superior) end of the ilio-pectineal line ; peroneal trochanter well developed, pointed, 
and projecting peronead beyond the shaft of the femur ; condyles approaching, but not 
attaining the equality existing in those of the lower Shniidae. 
MYCETES. 
Proportion of the supraspinous fossa to the infraspinous one greater than in any other 
of the Anthropoidea except the Gorilla; a peculiar process projecting forwards from the 
anterior margin of the suprascapular foramen (Plate XI. fig. 4 x) ; spine flattened at its 
upper (posterior) end ; subscapular fossa crossed by very strong ridges ; clavicle remark- 
ably and exceptionally slender (Plate XII. fig. 3) ; tuberosities of humerus very much 
below its head ; no supracondyloid foramen ; inner condyle descending as low as the 
inner margin of the trochlea ; olecranal fossa shallow, imperforate ; ridge on ulna, for 
pronator quadratics, very strongly marked ; pisiforme large, and expanded at its distal 
end ; anterior inferior (superior anterior) spinous process of the ilium distinct from that 
process which is the prolongation forwards (upwards) of the ilio-pectineal line ; ilio- 
pectineal eminence sometimes a very prominent process ; a more or less marked sub- 
pubic groove ; shaft of femur expanding very gradually downwards (Plate XIII. fig. 4), 
and much antero-posteriorly compressed at its lower half; linea aspera represented 
by a wide groove with very distinct lips ; trochanteric fossa deep ; peroneal trochanter 
