MACACUS. 67 



The characters of the pelvis of this thoroughly ferine example of this species 

 are worthy of being noted in view of Dr, Murie's remarks on the pelvis of the 

 female of M. cyclopis. The pseudo-sacral vertebra and the first caudal are in the 

 same plane with the sacrum, and from the uptilting characterising them and the 

 sacrum more capacity is conferred on the cavity of the pelvis than in M. cyclopis. 

 The bone anterior to and behind the thyroid foramen is thin and transparent, but of 

 great hardness, and thus contrasts much with the generally thickened and opaque 

 character of these parts in monkeys kept in confinement, and on what is so marked 

 a feature in the pelvis of M. cyclopis. The vertebrae and all the long bones cor- 

 respond to those of M. rhesus. The manubrium also has the same form as in 

 the latter monkey, but there are only five sternal pieces behind it. 



Measurements of skulls of the Irawady Monkey ? , and of M. rhesus $ , and 

 M. rhesus $ : 



M. rhesus, Irawady, M. rhesus. 



Inches. Inches. Inches. 



Anterior border of occipital foramen to tip of premaxillaries . . . 3'85 S24i 2"63 



Greatest length from occipital to tip of premaxillaries .... 5'23 4*57 4*13 



Occipital ridge to nasal process of frontal 3"52 3"26 3*28 



Anterior margin of auditory openings to tip of premaxillaries . . . 3*90 3"40 2'90 



Breadth between auditory openings 2'45 2'08 2*28 



Greatest breadth behind root of zygoma 2'97 2'40 2-47 



„ facial breadth across fronto-malar suture 3*03 2*48 2'40 



Anterior margin of occipital foramen to posterior border of mesial line of 



palate I'SS 1-41 116 



End of prsemaxilla to nasal process of frontal ...... 2"41 2'00 1'78 



Breadth of temporal fossa behind tempero-malar suture .... 1'75 1'75 1"85 



„ across zygomatic arch 3'57 2'91 3"00 



„ of muzzle at base of last tooth . 1-43 1*40 1-33 



„ of muzzle at first bicuspid ........ 1*41 1*30 1*15 



Height of orbit 0-90 0-85 0-90 



Diameter of orbit I'OS 0*93 ' 0-96 



Length of lower jaw in a line with alveolar margin 3"62 2"91 2"63 



Measurements of skeleton : 



Irawady, 



?. 

 Inches. 



Length of vertebral column (along inferior curve) 21"93 



„ „ cervical portion 1"88 



„ „ dorsal portion 4'60 



„ „ lumbar portion . . . . . . . • • 4*50 



„ „ sacral portion ......... 1*50 



„ „ pseudo-sacral vertebra ........ 0'45 



„ „ caudal portion . . . . . . . • - 9'00 



„ ,, humerus 5'57 



„ „ ulna ............ 5-94 



„ femur 6'10 



„ „ tibia (along internal border) 5*50 



„ „ hand to tip of middle finger 4*25 



„ „ middle finger 3*37 



„ „ foot 5-75 



„ „ middle toe 410 



„ „ scapula .......-•• 3'62 



