239 
One rather striking accompaniment to the denudation of thesé 
evergreen trees and shrubs was the uplifting of the branches after 
h : 
XXXI—NOTES ON NEW ZEALAND MARINE ALGAE. 
A. D,. Corton, 
A number of New Zealand algae have been from time to time 
examined and identified in the Herbarium, and in the course of their 
determination several puinis of interest have come to light. The 
publication of these will doubtless be of value to students in that 
country, and in the following notes the results of some recent 
Investigations are given. 
Pl. 300 (1827). On Ulva latissina, D.C., Otago, Lyall, March 
1850. On U. rigida, Ag., West Coast, Algae Muellerianae. 
Leathesia difformis, dresch., and Petrospongium Berkeleyi, Naeg. 
{In the Flora of New Zealand, Harvey does not include Leathesia 
diformis, Aresch., though he refers to L. Berkeleyi, Harv. (= Petro- 
spongium Berkeley, Naeg.) and Asperococcus sinuosus, Bory (= Col- 
pomenia sinuosa, Derbes & Sol.). The Lyall gathering of the latter 
at Kew is found, however, to consist of Leathesia diformis. As far 
as can be seen, the specimens differ in no way from the European . 
examples. 
The record of P. Berkeleyi, Naeg., is founded upon specimens 
sent by Colenso. The plant has not since been collected in New 
Zealand, and Laing suggests that Colenso’s plant may Sapectd be 
referable to Leathesia diformis, An examination of the original 
gathering shows that this is not the case. The type of structure is 
the same as that of P. Berkeleyi of Europe, but the filaments are 
more slender than in that species. It is probable that the New 
Zealand plant is specifically distinct from that of Europe, but 
further material is necessary before a definite statement can be 
made. Colenso notes that the plant occurred “ on tidal rocks near 
Cape Kidnapper.” 
Dictyota ocellata, J. dy., Anal. Algol. cont. 1, p. 68 (1894); 
Laing, Revised List, Addendum to Part 1, in Trans. & Proc. N.Z. 
Instit. vol. xxxiv., p. 358 (1901) ; see also vol. xxxii., p. 65 (1899). 
It is well known that whilst some 10 or 12 species of Dictyota 
occur in South Australia, only two species have been recor ed 
from New Zealand. Some of the New Zealand records have since 
been referred to other genera, others again have been questioned, $0 
that Laing in his “ Revised List of New Zealand Seaweeds, 1899, 
p. 65, remarked : “ Indeed I am by no means certain that we have 
in New Zealand any species of Dictyota, as it is quite possible 
