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400 



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300 



280 



260 



240 



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NUMBER OF POPULATiON 



Fig. 121 Separation of exposed rocky coast populations of 

 Hormosira hanksii by use of the discriminant function. This is 

 based upon diameter of bladder and length of connective. Group 

 of most exposed plants on the left, successive groups of decreasing 

 exposure to group of least exposed plants on the right. (After 



Bergquist.) 



REFERENCES 



Fucus 



Knight, M. and Parke, M. (1950). J. Mar. Biol. Ass. U.K., 39 > 439- 



Hormosira 



Bergquist, P. (1959). Botanika Marina, i (i), 22. 



Osbom, N. (1949). Trans. Roy. Soc. N.Z., 77 (i), 47. 



Ascophyllum 



Gibb, D. C. (1957). Journ. Ecol., 45 (i), 49. 



Oogonia 



Naylor, xM. (1949). Ann. Bot. Lond., N.S., JJ, 135. 



214 



