8 THE ZOOLOGIST. 
Walrus which was shot measured 11 ft. from the tip of the nose 
to the extremity of the spine, and 9 ft. in girth. The stomach 
of this Walrus was filled with large pieces of Seal’s skin, with 
the blubber attached, and also of pieces of liver. Last season 
we shot two, and both their stomachs were similarly filled; one 
of them, which was shot in the water, had a floe Seal in its 
mouth which it had just captured; so that the unfortunate floe 
Seals, persecuted on the ice by the Bears, are preyed upon by 
the Walrus while in the water. 
At this point a few words might be said with regard to the 
distribution and migrations of Mysticetus in these seas. The facts 
known are not numerous. A line drawn icewards, at right angles: 
to the sea margin, passes through the habitat of this animal. 
Following the course of such a line, the ice usually greatly 
broken up at the sea-edge owing to the action of the swell, would 
be found to consist of larger and larger pieces of ice, until finally 
the unbroken floes, as they left the Polar basin, would be found. 
Mysticetus would first be met with on losing the swell, and 
therefore a very variable distance through the ice, while beyond 
—a somewhat more sharply defined, but still more variable line— 
it would not be found. Between these ever-changing limits 
there is an area for the most part covered with floes and loose 
ice, which forms the habitat of the Greenland-Right Whale. 
With regard to their migrations two well-marked movements 
occur, viz., the advance of the Whales northward in spring, and 
their retreat southward in the autumn or “‘fall.” These 
migrations are undoubtedly associated with the presence of 
“bay”? or ‘‘ young” ice. During winter the open spaces 
between the pieces of old or heavy ice become frozen over, the 
sea being uniformly covered with ice. With the advance of 
spring, and consequent rise of temperature, the ‘“‘ bay” ice, as 
it is termed, gradually melts or ceases to form on the open 
spaces of water which are continually breaking out amongst the 
ice. Following the progress of this event, the northward 
migration occurs, while on the re-formation of the “bay ” ice, in 
the Fall, the Whales again return south. From this it follows 
that the area inhabited by Mysticetus might be represented by 
a band of variable breadth running parallel to the edge of the 
ice, the animal being most usually present where the temperature 
of the water is just above the freezing point. In the Greenland 
