I
I50
Scale: no. of species
I
Fro. 22 Estimated number of species of ascidians in the main zoogeographical areas, but escluding abyssal species. A, Southern
Japan; B, Indo-Malaya ; C, Western Indian Ocean ; D, Red Sea ; E, Northern Australia (Damperian) ; F, Northern .Australia
(Solanderian) ; G, Eastern Australia ; H, South-eastern Australia (Maugean) ; I, Southern Australia (Flindersian) ; J, Southwestern Australia (Baudinian) ; K, tropical West Africa ; L, tropical and subtropical American Atlantic ; 31, Mediterranean ;
N, tropical and subtropical American Pacific ; 0, boreal European Atlantic ; P. boreal American Atlantic ; Q, temperate
north-eastern Pacific ; R, tempcrate north-western Pacific ; S, Arctic ; T, Antarctic ; U, Antiboreal South American ; V, Kew
Zealand (Aupourian) ; W, New Zealand (Cookian) ; X, New Zeeland (Forsterian) ; Y, South Africa (south coast); Z, South
Africa (Namaqua).
cn
4