CABEREA 



383 



seems improbable, and I am inclined to await further evidence before accepting it as 

 Japanese. Possibly some of the Japanese records are based on glabra-like specimens 

 such as are discussed on p. 382. 



The known area of distribution of C. darwinii (see p. 375) corresponds very closely to 

 the sub-Antarctic and Antarctic regions of the southern ocean as limited, at the surface, 

 by the subtropical convergence (see Fig. 59, and Deacon, 1933, 1937), though the species 

 extends as far north as South Trinidad and the north of New Zealand (see p. 382). 



Table 1 . Summary of distribution of Caberea darwinii and Caberea glabra 



The heavy lines A and B mark the positions of the subtropical and Antarctic convergences (see Fig. 59). 

 The localities in the subtropical and sub-Antarctic zones are arranged according to their distance northward 

 from the convergence that constitutes the southern limit of the zone. The Antarctic localities are arranged 

 from north to south according to latitude. New Zealand lies across the subtropical convergence, but the 

 specimens come from the northern part of the islands. 



* Also known from Victoria and Tasmania. For discussion of related forms see p. 381. 



f Single specimen from shallow water. 



I Based on Hasenbank's figures, see p. 379. 



Table 1 shows the distribution of the different types of colony and a general tendency 

 is at once apparent, the small minima type being found to the north, the robust Antarctic 

 type to the south, and the intermediate types forming a roughly graded series in the 

 intermediate regions. 1 



The chief exception appears to be the colony of Swain's Bay type from Challenger 

 St. 142 which is off South Africa and north of the subtropical convergence (35 4' S, 



1 A specimen of Swain's Bay type from near Elephant Island was discovered too late for inclusion in 

 Table 1. As it should come between the South Orkney and South Shetland Islands it extends the range of 

 this type southward. 



