On the Phases of Development of the Trichodina pediculus (?). 269 
interior of Germany quite a different race of tame oxen was found, 
much less in size, with smaller horns, and often without any : 
this will be treated of in the next article. 
This same small race was, without doubt, found among the 
Germanic tribes also here in Scandinavia, where the inhabitants, 
accustomed to small cattle, looked upon those introduced by the 
Jotens as so enormously large. That this race might exist at 
one and the same time, and in the same country, both wild and 
tame, is not more extraordinary than that the reindeer in Lap- 
land and the swéne in the whole of south and central Europe should 
yet exist in the same tracts both in a wild and tame state. 
That the wild Urox from the earliest times was an object of chase 
to the inhabitants here, is proved beyond contradiction by the 
before-mentioned skeleton preserved in the museum at Lund. 
This race of wild oxen has never lived m Scandinavia further 
north than Scania, and even here the fossil remains occur for the 
most part m the districts of Skytts, Bara and Wemmenhég. 
Once only have I obtained a skull from Allerum in the district 
of Luggude. 
We perhaps may be astonished at the thought that so colossal 
an animal as an ox of this race, whose natural food was grass, 
could winter in a country such as this, where the snow covers 
the fields often during five to six months of the year, and where 
the grass during that period either failed or was imaccessible. 
But our astonishment ceases when we see how the cattle support 
life during the winter in the forest tracts ; with what avidity they 
bite off and devour the tender branches with their buds, and the 
catkins of birch, hazel, sallow and other species of willow. Those 
places where the Urox wintered were certainly thickly grown 
with the above-named trees, and from them it sustained life. It 
is not more surprising than to see the Elk live and winter in 
climates which are much more severe than that in which the 
Urox existed. 
[To be continued. } 
XXX.— Observation of some of the Phases of Development of the 
Trichodina pediculus (?). ByJ.T. Artipex, A.B., M.B. (Lond.), 
Member and Student in Anatomy of the Royal College of Sur- 
geons. 
[ With a Plate. ] 
In examining the contents of a bottle of water procured from a 
pool in the swampy part of Hampstead Heath, in the past month 
(July), and during the drought prevailing at that time, I en- 
countered an animaleule which I determined to be, most pro- 
bably, the Trichodina pediculus (Ehr.). Perceiving that the ani- 
mal was disposed to remain in the same locality under the mi- 
