MAMMALS FROM CENTRAL CHINA. 691 



20. Cricetulus TRITON Thos. 



2 . 2011. King-tze-Kwan, S.W. Honan. 



c^. 2013,2018. -Shan-nan-hsien, S.E. Shen-si. 



2 . 2028, 2029, 2062. Shang-chou Dist., S.E. Shen-si. 



21. Cricetulus andersoni Thos. 



c?. 2116, 2117. Si-ngan-fu, S. Shen-si. 1200'. 



22. Microtus calamorum superus. 



Thos. Abstr. P. Z. S. 1911, p. 27 (May 2). 



d. 2121, 2127, 2128, 2129, 2138, 2139, 2147, 2154, 2163, 

 2181, 2182, 2183. . 



2 . 2119, 2120, 2130, 2146, 2155, 2164, 2179, 2180. 30 miles 

 S. of Feng-hsiang-fu, S. Shen-si. 3600'. 



A larger longer- tailed race of the Nanking Vole. 



Fur longer and finer than in true calamorum, the hairs of the 

 back about 16 instead of 10 mm. in length. Colour quite as in 

 calamorum, except that all the specimens have a dull buify suffusion 

 in the surface-colour of the abdomen, this being only the case in 

 cei'tain of the younger examples of calamorum, the older ones 

 having the belly clear greyish white. Tail longer than in cala- 

 morum, the usual length in adult specimens 60-63 mm., as against 

 52-53 in that animal, its coloration more prominently bicolor. 



Skull like that of calamo7-um, but slightly longer than in speci- 

 mens of similar age. Nasals longer. Bvilla3 generally larger. 



Dimensions of the type, measured in the flesh : — 



Head and body 130 mm. ; tail 63 ; hind foot 24 ; ear 13. 



Skull : condylo-basal length 33 mm. ; condylo-incisive length 

 33*2 ; zygomatic breadth 17'8 ; nasals 8'5 x 3'6. 



Ty23e. Adult male. B.M. No. 11.6.1.45. Original number 

 2163. Collected 7 January^ 1910. 



This Shen-si representative of the Lower Yang-tze Reed-Vole 

 is distinguishable by its longer tail and longer fur, the latter in 

 obvious correlation with the greater altitude at which it is found. 



23. Microtus mandarinus M.-Edw. 



2 . 2032. Shang-chou Dist., S.E. Shen-si. 

 Skull. S.E. Shen-si. 



The specimens referred to in the description of Microtus 

 Johannes (P. Z. S. 1910, p. 637). 



24. Microtus (Caryomys) nux Thos. 



S. 2041, 2042, 2043, 2072, 2073, 2088, 2089, 2090, 2097, 

 2098. 2- 2044, 2050, 2091, 2100. Shang-chou Dist., S.E. 

 Shen-si. 



J. 2110, 2111. Ching-ling Mts., Lo-nan-hsien, S. Shen-si. 



Described from these specimens, P. Z. S. 1910, p. 636. No. 

 2089 (B.M. No. 10.5.2.79) the type. 



