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- short body are primitive.
Some of the oldest Cambrian so called
arthropods show no evidence of jointed
appendages + Lewche regards the appendages
they show as actually gills. One of
the fossils shows a projection from
the head that looks exactly like an
annelid proboscis, in these early
creatures also there is no head segmentation
or appendages, it carries only the eyes.
vide Leanchoilea. He feels that an early
Cambrian coevolution - polyclad was
the explosive ancestor of the annelids
molluscs + arthropods.
In evening saw Baerends film
July 20 [date crossed out] of egg recognition in the
herring gull. Expt. [experiment] consisted of altering
eggs in size (x 1 1/2 + x 2); in proportion
1 1/2 larger x normal width + reverse; in shape,
+ in colour, plain, large + small spots
of some #, large + small of some area;
positive or neg [negative] spotting. All tests were
prevented first against real eggs + then
against each other by placing side by
side on rim of vent with its own
eggs removed. The position of the 2 exp [experimental]
eggs was secured in a second trial to
eliminate position preference. The
left one was taken first when it was
all even. The larger egg was taken
preferentially, the rounder against the
square cornered, the real against
the artificially altered in colour, except
that a pale egg larger in size with a large number of
small dark spots was most attractive
of all.
A film of the gray seal was not
very revealing, it demonstrated a
peculiar territorial action of rolling over.
July 20 [1958] London.
All day at the Whipsnade Zoo. A most
interesting place in which all the
animals are in very large areas. The
tigers were most attractive. So were
the European brown bears. Of special
interest to me were the Formosan deer -
antlers clean. Pere Davids deer - antlers clean.
Spotted deer - antlers velvet, Sika (very
dark + antlers in velvet. Several
excellent cranes, photographed Sarus on
nest + manchurian; Rhinos were numerous
+ healthy. Saw an ostrich evert
the penis while defecating. It was
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