SINO-MONGOLIAN FRONTIER 



The biological work of the year ending in 

 August, 1912, as might be expected, was very 

 much hampered by the unsettled state of the 

 country. From October 27, 1911, to May 10, 1912, 

 more than half the year, not a single specimen was 

 added to my collection, except three antelope 

 skulls, which I purchased in the Tientsin game 

 market. Subsequently we tried to make up for 

 lost time, making collections during the summer 

 in North Shansi and on the Mongolian Plateau. 

 Altogether from October, 1909, to August, 1912, 

 about two hundred and seventy specimens of 

 mammals were collected, including forty-five species 

 and subspecies. 



Very little was done in the w^ay of collecting 

 birds or cold-blooded vertebrates, while inverte- 

 brates were left entirely alone. It was unfor- 

 tunate that I could not do more in these branches 

 of zoology, but reptiles and amphibeans were 

 almost non-existent in most of the localities 

 visited. It was only in Mongolia that insects 

 were at all plentiful, and while travelling in that 

 country I had my time occupied with other 

 important work. 



Following is a list of the different species and 

 subspecies of mammals obtained on the various 

 expeditions subsequent to the Clark Expedition. 

 For the sake of the general reader I have given 

 popular names of my own to distinguish the 

 different forms. 



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