Aim elidn . 
TRACK. OF 
H.M.S.CHALLENGER 
Decf 1872 to 1876. 
En^*td hj llall^iV Si' 
"^7 
I 
i 
1 
L 
; 
1 
! 
16 )« u'o* m|o* i»* 120“ ao* lob 
