FACING PAGE. 



Plate 49A. — David's Squirrel. {Sciurotatnias david- 



ianus) . . . . . . . . 120 



,, 50. — Three-toed Jerboa. {Dipus sowerbyi) . . 122 



,, 51. — Suslik. {Citellus mongolicus) . . . . 126 



„ 5 1 A. — Polecat. {Mustela larvata) . . . . 126 



,, 52. — Allactaga. {Allactagamongolicalongior) 128 



,, 52A. — The Pika. (Ochotona annectens) . . 128 

 ,, 53. — Wild Pig. (Sus moupinensis) . Shot 



near Yen-an Fu, Shensi . . . . 136 



>> 53A. — Domastic Pig . . . . . . • . 136 



54. — Mud Turtle. {Trionyx sinensis) . . 140 

 ,, 54A. — Day's Bag near Yen-an Fu. Roedeer, 



pheasants and hare . . . . 140 



Plate 55. — The Summit of Mo-^rh Shan, Shansi . , 

 .. 55A. — Sandstone Beds, west of the Chiao- 



ch'eng Shan, Shansi 

 „ 56. — Loess Plateaux, east of Fu-chou, Shensi 

 ,, 56A. — Loess showing stratification, Shansi . . 

 „ 57. — Valley near Chen-yiian Hsien, showing 



the dip of the Sandstone beds 

 ,, 58. — Sandstone Strata at Sui-t^ Chou, 



Shensi 

 „ 5 8a. — Canon in Limestone Formation west 



of Fen-chou Fu, Shansi . . 



FACING PAGE. 

 144 



144 

 148 

 148 



MAPS. 



General sketch of route followed by expedition 



(Scale 1/6,000,000) . . . . Frontispiece. 



Route of the Clark Expedition through Shansi, 

 Shensi and Kansu (Scale 1/1,000,000) 



(In pocket at the end) 



