LAMARCK THE ZOOLOGIST Ig! 
On page 70 he speaks of the animal chain or series, 
from the monad to man, ascending from the most 
simple to the most complex. The monad is one of 
his Polypes amorphs, and he says that it is the most 
simple animal form, the most like the original germ 
(ébauche) from which living bodies have descended. 
From the monad nature passes to the Volvox, Pro- 
teus (Amceba), and Vibrio. From them are derived 
the folypes rotiferes and other “ Radiaires,’’ and 
then the Vers, Arachnides, and Crustacea. On page 
77 a tabular view is presented, as follows: 
. Les Mollusques. 
. Les Cirrhipéedes. 
. Les Annelides. 
. Les Crustaceés. 
. Les Arachnides. 
. Les Insectes. 
. Les Vers. 
. Les Radiaires. 
. Les Polypes. 
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oOo ON 
It will be seen that at this date two additional 
classes are proposed and defined—z.e., the Annelides 
and the Cirrhipedes, though the class of Annelida was 
first privately characterized in his lectures for 1802. 
The elimination of the barnacles or Cirrhipedes 
from the molluscs was a decided step in advance, and 
was a proof of the acute observation and sound judg- 
ment of Lamarck. He says that this class is still 
very imperfectly known and its position doubtful, 
and adds: ‘‘ The Cirrhipedes have up to the present 
time been placed among the molluscs, but although 
