ANATOMICAL NOTES ON MALAY APES. 79 



a dirty yellow hue, and a black stripe down its back, which is 

 spreading laterally. 



D. — Papio cyno?nolgus (crab-eating baboo 11;. 



Abundant near the sea side. No dissections. 



I have had tame specimens of all three species. MentalK 

 they differ immensely. A young female P. cynomolgus was 

 full of mischief, fun and fight. P. neiuestrinus was quiet 

 and retiring, but given to lasting fits of. anger; while P. 

 arctoides was a most staid individual with a far-away gaze 

 and his whole mind seemed steadily occupied sexually. 



E. — Semnopithecus albocinereus (Schinz), (steel-grev mon- 

 key). 



Dissected 13 Adults. 

 2 Foetuses. 



F. — Semnopithecus femo rails (Horsfield), (black monkey). 

 Dissected 1 Adult. 

 1 Foetus. 



The foetus and babies of both are of a dull buff yellow. 

 S. albocinereus is anatomically very variable, as one would 

 expect from the immense number of nearly allied species. 

 In Bangtaphan both of these species are very abundant. They 

 have very distinctive cries ; that of S. albocinereus is a deep 

 guttural ejaculation, while that of S. femoral is, though 

 evidently produced in a similar manner, has a distinctive 

 metallic timbre, which medical men would describe as a 

 "cracked pot" sound, 



G. — Nycticebus tardigradus. (Slow lori 



Rare. No dissections. 

 Elucidation of some of the details has required dissections 

 of other animals, amongst these : — 



1. A young Bornean mias (orang-utan). 



2. Galeopithecus volans (2 specimens) (flying 



lemur). 



3. Pteropus marginatus (2 specimens) (bat). 



IV. — Variation of the Spleen. 



Within the bounds of health, the spleen varies in weight 

 with the phase of digestion and period of the day. But I take 

 it, that an increase of one-third in weight, bevond the average 



