The structure and coloration of cell contents exhibit the
closest alliance to the characteristics of the division of Chroolepideae
and of this small division of Chlorophyllaceous Algae, nearest to
Gongrosira--a genus whose five to six species are inhabitants of fresh
water, mostly attached to various minute aquatic Algae and mosses. Each
cell of all the plants of this genus produces a large number of mobile
cells--zoospores.
Fig. 9 represents very probably one zoospore developed from these plants
as figured from 10 to 16.
* * * * *
CARBON.
M. Berthelot, in the _Journal de Pharmacie et de Chimie_ for March,
states that from peculiar physical relations he is led to suspect that
the true element carbon is unknown, and that diamond and graphite are
substances of a different order. Elementary carbon ought to be gaseous
at the ordinary temperature, and the various kinds of carbon which
occur in nature are in reality polymerized products of the true element
carbon. Spectrum analysis is thought to confirm this view; and it is
supposed the second spectrum seen in a Geissler tube belongs to gaseous
carbon.
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