ME. ST. GEORGE MIVABT ON THE SKELETON OE THE PEIMATES. 
421 
LEMURIHE OTHER THAN THE NYCTICEBIN®. 
Pectoral limb always shorter than spine ; anterior margin of scapula convex ; clavicle 
often with only one horizontal curvature ; great tuberosity of humerus as high as its 
head ; supracondyloid foramen large and constant ; olecranal fossa imperforate ; inter- 
medium present or absent ; tuberosities of ischium never approaching very near its 
spine ; posterior inferior (inferior anterior) spinous process of ilium well developed 
(Plate XIII. fig. 2, sp); condyles of femur unequal; head of femur not compressed; 
rotular surface deep, its margins very unequal; patella elongated; tibial malleolus 
opening from the side of the tibia; groove for tibialis posticus not extraordinarily 
marked; tarsus sometimes much elongated; naviculare more or less considerably 
enlarged antero-posteriorly. 
INDRIS. 
Por this see above, “ Exceptional forms.” 
MICRORHTN CHUS *. 
Humerus with a strong sigmoid curvature, also supinator ridge; olecranon very 
small ; ulna not diverging from radius so much as in Indris ; pisiforme very small ; no 
os intermedium; proportion of metacarpal of index to that of pollex as 18 3’ 3 to 100, or 
greater than in any other Lemuroid; tibia to radius as about 149 - 1 to 100, or almost 
the proportion of Man ; fibula exceedingly slender ; length of cuboid to os calcis as 
about 37'6 to 100 ; of naviculare to the same, about 38-9 ; naviculare expanding down- 
wards but little. 
LEMUR. 
Pectoral limb scarcely more than three-fourths of the length of the spine ; angle of spine 
of scapula with vertebral margin less than in the other Lemuridse measured ; supraspinous 
fossa very large as compared with the infraspinous one ; margin of spine of scapula 
slightly bent over the infraspinous fossa ; spine approaching very near to the axillary 
margin and glenoid surface ; supraspinous fossa slightly exceeding the infraspinous one 
at the glenoidal end of the spine of the scapula ; acromion remarkably flattened and con- 
cave externally, with a strong metacromion-like projection over the infraspinous fossa; 
clavicle sometimes less than a tenth of the length of the spine ; shaft of humerus much 
curved ; great tuberosity rising above the head of the humerus ; supinator ridge exceed- 
ingly marked ; radius sometimes only a quarter of the length of the spine ; ridge on ulna 
for pronator quadratus very large ; an os intermedium ; fifth digit longer than index ; 
ilio-pectineal line not forming the actual inferior (anterior) margin of the ilium; 
peroneal trochanter rising more or less above the head of the femur, and projecting very 
peronead beyond the shaft; trochanteric fossa small but deep; a third trochanter ; peroneal 
condyle smaller than the tibial one ; tarsus but little more than one-tenth of the length of 
* For further details see Proc. Zool. Soe. 1866, p. 133. From the structure of the skull I have now no 
doubt hut the Propithecus diadema, of Bennett, closely resembles Indris brevicaudatus in its appendicular ske- 
leton. See Proc. Zool. Soc. 1867, p. 247. 
3 l 2 
