WITH SPECIAL REFERENCE TO THE CETACEA. 
21 
Archipelago, the intricate channels of which there is no 
evidence to show they pass through to join their brethren in 
Baffin Bay. The views here expressed are strengthened by 
the fact that between the years 1897 and 1900 only three 
Right Whales were seen by the Whalers in the seas to 
the east of Greenland, two of which were killed, and since 
the latter year no Scotch vessel has visited these seas which 
formerly swarmed with these valuable animals, and it is 
only too probable that they have been exterminated in this 
vast expanse of ocean. Had there been any communication 
with Davis Strait, where Whales are still plentiful, this 
could not have been the case. 
I have endeavoured here to show how universal these 
periodic movements, which we are accustomed to designate 
as “ migration,” are, and that they are by no means confined 
to creatures endowed with the powers of flight — also that 
just as the same individual birds do not extend their migratory 
journey over the whole area in which the species occurs, 
but pass in relays, those spending the summer in the extremest 
north not going so far south in winter as those breeding in 
more southerly localities, some of our familiar birds which 
are apparently sedentary species and with us the year round 
not being represented by the same individuals at all seasons — 
so the various races of fishes and marine mammals do not 
cover in their- migrations the whole area in which the species 
is found, but in all probability are much more restricted in 
their movements than is generally supposed. 
N.B. — This Paper was read before the Society in April, 1904, but part 
of the MS. having been lost, the opportunity has been taken to embody an 
important result of Dr. True's study of the Fin Whales of the north-west 
Atlantic, which had not then been published. — T.S. 
