564 Transactions. 
CONCLUSION. 
The study of the anatomy of Durvillea antarctica shows that there is 
not much differentiation of tissue in the three regions, the tissues of one 
passing gradually into those of the other. There is no special conducting 
tissue, as in Macrocystis ; the meristematic tissue of the holdfast is perhaps 
worthy of mention. Oltmann considers this plant one of the lowest of 
the fucoids, and this is borne out by the results attained in the present 
study. 
which the mies lives. In this connection also the study of the Bounty 
Island form should throw further light on the problem of the variation of 
the plant in response to external stimuli. 
. The st udy of large seaweeds Such as this is аа іп oon 
leaves of higher plants, which his theory demands ; but, on the other 
ace of a “ basal absorptive mechanism " nor sign of 
an upward conductive axial tissue which would be necessary if Durvil 
were to lead on to anything higher in the scale of plant-forms. 
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GRABENDORFER, J., 1885. Pte ide zur locom is der Tange. 
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