ief account of the life history of some ecto- and some
endo-parasites--Nematodes, Trematodes. He pointed out how that
in nearly every case there was a secondary host, how in some cases
disease was caused, and in others the presence of the parasite was even
helpful. He acknowledged the small progress that had been made in this
study. He mentioned ankylostomiasis, blood-sucking worms, Bilhartsia
(Trematode) attacking bladder (Egypt), Filaria (round tapeworm),
Guinea worm, Trichina (pork), and others, pointing to disease caused.

From worms he went to Protozoa-Trypanosomes, sleeping sickness,
host tsetse-fly--showed life history comparatively, propagated in
secondary host or encysting in primary host--similarly malarial germs
spread by Anopheles mosquitoes--all very interesting.

In the discussion following Wilson gave some account of the grouse
disease worm, and especially of the interest in finding free living
species almost identical; also part of the life of disease worm is
free living. Here we approached a point pressed by Nelson concerning
the degeneration consequent on adoption of the parasitic habit. All
parasites seem to have descended from free living beasts. One asks
'what is degeneration?' without receiving a very satisfactory
answer. After all, such terms must be empirical.

_Thursday, May_ 25.--It has been blowing from south with heavy gusts
and snow, temperature extraordinarily high, -6 deg.. This has been a heavy
gale. The weather conditions are certainly very interesting; Simpson
has again called attention to the wind in February, March, and April
at Cape Evans--the record shows an extraordinary large percentage
of gales. It is quite certain that we scarcely got a fraction of the
wind on the Barrier and doubtful if we got as much at Hut Point.

_Friday, May_ 26.--A calm and clear day--a nice change from recent
weather. It makes an enormous difference to the enjoyment of this
life if one is able to get out and stretch one's legs every day. This
morning I went up the Ramp. No sign of open water, so that my fears
for a broken highway in the coming season are now at rest. In future
gales can only be a temporary annoyance--anxiety as to their result
is finally allayed.

This afternoon I searched out ski and ski sticks and went for a short
run over the floe. The surface is quite good since the recent snowfall
and wind. This is satisfactory, as sledging can now be conducted on
ordinary lines, and if convenie