LAMARCK THE ZOOLOGIST 



191 



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 

 {Sauche) from which living bodies have descended. 

 From the monad nature passes to the Volvox, Pro- 

 teus (Amoeba), and Vibrio. From them are derived 

 the Polypes rotifires and other " Radiaires," and 

 then the Vers, Arachnides, and Crustacea. On page 

 "JJ a tabular view is presented, as follows : 



1 . Les Mollusques. 



2. Les Cirrhipedes. 



3. Les Annelides. 



4. Les Cruslac/s. 



5. Les Arachnides. 



6. Les Insectes. 



7. Les Vers. 



8. Les Radiaires. 



9. Les Polypes. 



It will be seen that at this date two additional 

 classes are proposed and defined — i.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 



