Lamarck’s Genera of Shells. 67 
In the descriptions we have preferred the mere anglicising 
many of the terms of obvious etymology, to the periphrases 
which their full translation would have required. In doing so, 
we hope we have equally avoided prolixity and obscurity, as 
the terms are for the most part of very common occurrence in 
natural history descriptions. 
Lamarck, in his classification of animals, adopts what may be 
called an ascending scale, beginning with the lowest or most 
imperfect, and gradually proceeding to the most perfect. He 
separates them into two great divisions; the first contains those 
which have no vertebre, the second those which have vertebra. 
The first division is subdivided into two parts. 
Part Ist. 
Apatuic AnIMaLs which haye no sensation, and only 
j move in consequence of excited 
(contains 5 classes) 
irritability. 
1. Infusoria. 4. Tunicata. 
2. Polypi. 5. Vermes. 
3. Radiaria. 
Parr 2d. 
SENSIBLE ANIMALS which are endowed with sensations 
ebntatad YAtdaabe) and the simple perception of ob- 
Jects. 
6. Insecta. 10, Cirripeda. 
7. Arachnida. 11. Conchifera. 
8. Crustacea. 12. Mollusca. 
9. Annulata. 
The second division consists of only one part. 
INTELLIGENT ANIMALS (endowed with sensations, and per- 
ceptions in different degrees, and 
the more perfect with intelligence. 
13. Pisces. 15. Aves. 
14. Reptilia. 16. Mammifera. 
We have only to do with the four last classes or the second 
part of the first division. 
Vox, XIV. F 
(contains 4 classes) 
