60
40
20
0
20
40
60
90
60
3 0 W .
0
30.5.
60
90
I20
150
180
150
120
90
FIG. 24. Records of ascidians from water deeper 'than 2 000 m. Zoogeographical divisions : A, Pacific-North-Indian area ; A( 1) Pacific
sub-area ; A( la) North Pacific Province ; A( Ib) West Pacific Province ; A( Ic) East Pacific Province ; A(2), North-Indian sub-area ;
B, Atlantic area ; B( 1) Arctic sub-area ; B(2) Atlantic sub-area; B(2a) North Atlantic Province ; B(2b) West Atlantic Province ; B(2c)
East Atlentic Province ; C, Antarctic area; C(1) Antarctic-Atlantic sub-area ; C(2) Antarctic-Indian-PacSc sub-area; C(2a)
Indian Province; C(2b) Pacific Province.