14
R. K. DELL
FIQ. 1. Biogeographio divisions as used in the present work (adapted from Hedgpeth,
l909), showing essentially the three oonoentrio zones of the High Antarotio Region,
the Antarotio Region (essentially referring to plankton) and the Subantarotio
Region. 1. Megellado; 2. Tristen de Cunha; 3. Kerguelenian; 4. Continental
Antarotio; 5. South Ueorgien Distriot.
It is difficult enough to define provinces for one group of plants or
animals. To find common provincial boundaries for many different
groups of animals has not proved an easy task. Since littoral distribution patterns may not correspond with those on the shelf or in deeper
R. K. DELL
FIQ. 1. Biogeographio divisions as used in the present work (adapted from Hedgpeth,
l909), showing essentially the three oonoentrio zones of the High Antarotio Region,
the Antarotio Region (essentially referring to plankton) and the Subantarotio
Region. 1. Megellado; 2. Tristen de Cunha; 3. Kerguelenian; 4. Continental
Antarotio; 5. South Ueorgien Distriot.
It is difficult enough to define provinces for one group of plants or
animals. To find common provincial boundaries for many different
groups of animals has not proved an easy task. Since littoral distribution patterns may not correspond with those on the shelf or in deeper