586 FROM NORTH POLE TO EQUATOR. 



Note 87, p. 539. — The. Exile System. 



The reader should consult Dr. Lansdell's ThroughSiheria (London, 1882); 

 H. de Windt's Siberia As It Is (London, 1892) ; Seebohm's Siberia in Asia 

 (1882). While some, e.g. de Windt, give an account of the exile system 

 which agrees with Brehm's, it should be noted that others think very 

 differently; see Kennan's Siberia and the Exile System (1891). 



AN ORNITHOLOGIST ON THE DANUBE. 



Note 88, p. 563. — The Penduline Titmouse. 



A very small species of titmouse occurring in Southern Europe and 

 Africa. Its remarkable nest (see figure) is formed of a felt woven of hemp 

 or wool often mixed with goat's hair. It usually hangs on the extreme 

 end of a branch just over water. Both birds share in the work of building, 

 as also in that of hatching and rearing the young, of which there are 

 usually seven. 



