Herriotr.—Morphological Notes on the New Zealand Giant Kelp. 563 
Bounty Island. The island consists of a few rocks, almost destitute of 
vegetation, and this seaweed forms a fringe round it, exposed to most 
tremendous seas. The Durvillea seen on the other subantarctic islands 
of New Zealand was the ordinary dark-brown D. antarctica 
On only one portion of the frond were there any indications of air- 
chambers ; the central tissue was just beginning to break down. On this 
ortion were conceptacles filled with branched hairs bearing antheridia. 
The structure of these conceptacles agreed quite well with that of those 
of the ordinary form. ; 
The cracks on the stipe were much deeper and usually wider than in 
the more common form, while the markings on the frond were continued 
up the main segments and were lost only on the finer divisions. 
According to Dr. Cockayne, Bounty Island is subjected to very violent 
storms, and one would naturally expect a form which managed to main- 
tain an existence under these conditions to show some modifications in its 
structure. These are found in this case in the finer filamentous segments 
of the frond, and in the pits and markings, which enable the plant to 
withstand a great strain. This plant, then, marks an extreme D. antarctica 
tendency, and may be considered as a variety of that species, which has 
developed in a manner exactly opposite to D. Harveyi. Further specimens 
of this form should be obtained and compared with Areschoug’s specimens 
from South America. 
Young Plants. 
over a mass of harder and more compact tissue, evidently the original 
holdfast of the large plant. This layer was soft, and could easily be cut 
away from the harder tissue below. A ring of a slightly darker colour 
From all appearances it would seem as though m this case the ripe egg had 
fast by sending down an organ resembling the haustoria of the parasitic 
phanerogams, but under the microscope the tissue appeared to be homo- 
