DEFINITION OF THE TERM [NSECT. ll 
that of Vertebrataor animals that have a vertebral column, 
and Invertebrata or those that have no vertebral column 
These he distributes into three primary divisions accord- 
ing to their supposed degrees of intelligence—Thus : 
* Apathetic Animals. 1. INFUSORIA. 
2) Polyer 
8. Rapiara. 
4, VERMES. 
* * Sensitive Animals. (Lipizoaria). 
5. INsEcTaA. 
6. ARACHNIDA. 
7. CRUSTACEA. 
8. ANNELIDA. 
9. CIRRHIPEDA. 
10. Mouwusca. 
* * * Intelligent Animals. 11. Pisces. 
12. ReEptTiia. 
13. AVES. 
14. Mammatta.? 
Profiting by the light afforded by the Aristotelian sy- 
stem, this eminent zoologist improved, we see, upon that 
of Linné, by resolving his Jnsecta into three classes, and 
his Vermes into seven, interposing the Linnean Insecta 
between the four first and three last, in which he was 
not so happy, since as to sense insects should certainly 
occupy the place he has here assigned to the Mollusca. 
In the work from which I have taken this statement 
of Lamarck’s system, that acute writer has given a sketch 
of another method of arrangement, in which he has made 
the first deviation from the beaten track of an unbroken 
and unbranching series. In the Supplement to the first 
2 Anim. sans Vertebr. i. 381. 
