MACACUS. 



61 



SkTTLL MEASUEEMEiS^TS. 



Anterior back of occipital to tip of premaxillaries . 

 Greatest length of occipital to premaxillaries .... 

 Occipital ridge to nasal process of frontal .... 

 Anterior margin of auditory opening to tip o£ premaxillaries . 

 Breadth between auditory openings (callipers) ... 



Greatest breadth behind roots of zygoma (callipers) ; 



„ facial breadth across fronto-malar sutures 

 Anterior margin of occipital foramen to maxalline of palate . 

 End of premaxilla to nasal process of frontal . . . 



Breadth in temporal fossa behind tempero -malar suture (callipers) 



„ across zygomae 



Breadth of muzzle at base of last tooth ..... 



„ „ first bicuspid 



Height of orbit 



Diameter of orbit 



Length of lower jaw in line with alveolar border 



M. rhesus $ 



Inches. 

 2-63 

 3-94 

 3-25 

 2-55 

 215 

 2-30 

 2-28 

 1'20 

 1-57 

 1-82 

 270 

 1-20 



ri2 



•81 



•90 



2-45 



M. rhesus^ 



/3- 



Inches. 



2-75 

 4-00 

 3-28 

 2-63 

 2-34 

 2-50 

 2-28 

 1-28 

 1-57 

 1-68 

 2^80 

 1-28 

 1-17 

 •71 

 •90 

 2-50 



Measurements or skeletons. 



Length of cervical vertebrae . . . . 



„ dorsal „ . . . . 



„ lumbar „ . . . . 



„ sacral „ . . . . 



„ caudal „ . . . . 



„ humerus .... 



„ radius .... 



„ ulna .... 



„ femur .... 



„ tibia .... 



„ manus .... 



„ pes .... 



„ OS innomatum .... 



Antero-posterior diameter of pelvis 

 Transverse „ „ • • 



Oblique „ „ ^ • • 



Symphysis pubis to spine of ischium 

 Greatest breadth of os innomatum, anterior end 



M. rhesus $ 



/3. 



Inches. 



2-20 

 5-50 

 4-7G 

 1-62 

 10-90 

 4-87 

 4-96 

 5-73 

 5-93 

 5-32 

 3-81 

 5-50 

 5-05 

 2-42 

 1-85 

 2-22 

 2-06 

 1-23 



Neither M. rhesus nor M. assamensis were included in Blyth's posthumous 

 Catalogue of the Mammals of Burma/ because it was not until the expedition of 1875 

 that I received the first from the valley of the Irawady on the authority of Dr. 

 Marfels, the Conservator of Torests to the King of Burma, and it was only on 

 the same occasion that I procured an example of the last from the second defile 

 of the Irawady below Bham6. 



A monkey thus in no way separable from the Indian M. rhesus would appear to 

 stretch across Burma to the hills defining the left bank of the valley of the Irawady, 

 and to be associated in the same region with the next species, the distribution of 

 which, however, would appear to be more restricted to the northern portion of 

 the valley. 



With regard to M. oinops, a careful consideration of the characters assigned 

 to it by Hodgson does not reveal a single feature by which it may be separated 



^ Journ. As. Soc. Bengal, vol. xliv. 1875. 



