I9II.] 



F. H. Stewart : Cyprinidae from Tibet, 



exists in the species, namely in the proportion of the size of the 

 head to the body. These differences are exhibited by the three 

 proportions — 



Length of body Length of body Length of bod}^ 

 Breadth of head' Length of head' Height of head ' 



In table ii the groups are arranged in order according to this 

 measurement (cols. 3, 4 and 5), and it will be seen that the Pamir 

 specimens have the smallest heads, the Kang-ma specimens the 

 largest, while the Guru and Chumbi groups are intermediate. It 

 is noteworthy that a classification by this character is a cross- 

 classification to the division into the two species, since P. i and 

 4 are separated by P. 2 and 3 and P. 2 is widely separated from 

 D, I and K. Table iii also shows that there is no overlapping 

 of the extreme measurements between the Pamir and Kang-ma 

 groups. 



Table II. 



The above table gives the average measurements of groups in 

 regard to — 



col. 2, total length; 



,, 3, body length divided by head breadth ; 

 o 4, ,, ,, ,, „ „ length; 



,, 5, ,, „ ., „ ,. height 



Column 6 gives the number of specimens measured. 

 The following table (p. 82) gives the extreme measurements of 

 individual specimens in the various groups : — 



Col. 2, total length in millimetres. 



3, ,, ,, divided by maximum body height. 



4, ,, ,, ,, ,, head breadth. 

 5> ,, >, „ ,, ,. length. 



6, „ ,, ,, ,, ,, height. 



7, head length divided by diameter of eye. 



Column 8 gives the number of specimens. 



