66 THE LIFE OF THE MOLLUSCA 
ing to the climatic zones they approximately occupy, 
further distinguishing between those of the Old and 
the New World, as follows (see Map, facing) : 
Old World. New World. 
Circumpolar ) 21. Canadian, 
1. Septentrional | and North |incading Alas- 
Temperate kan. 
2. Atlantidean 
3. Circa- Mediter- 
ranean | Northern 22. Californian. 
4. Central Asian Subtropical (23. American. 
5. Chinese 
6. Japanese ] 
4. African, West 
8. African, Central 
and East 
g. Malagassy 
to. Afro-Arabian 
tz. Indian [ 
12. Indo-Chinese ae ast taal 
a rie Tropical 426. Columbian. 
15. Austro-Malay- 27. Peruvian. 
sian, and Aus- 28. Brazilian. 
tralian, N. of 
20° S. 
16. Austro - Polyne- 
sian 
17. Polynesian ) 
18. African, South 
1g. Australian, S. of| Southern fag. Chilian. 
20° S. Subtropical |30. Argentine. 
20. New Zealand 
None { ee | sr. Patagonian. 
(No non-marine Mollusca are known from the true 
Antarctic Region.) 
