MARINE ALGiE FROM THE KERMADECS 19 



by oceanic currents from the north and from the south-west, the 

 latter being the stronger of the two. The result of this upon the 

 algae is shown by the fact that the majority of the species received 

 belong to the New Zealand flora, and at least one {Peyssonnellia) 

 to the flora of the Friendly Islands. 



The Kermadecs were visited by H.M.S. 'Herald' in 1854 under 

 Captain H. M. Denham, whose name is perpetuated in the chart 

 of Sunday Island. On board were the naturalists Milne and 

 MacGillivray, who made a small collection of plants, which were 

 described by Sir Joseph Hooker (Journ. Linn. Soc. Bot. i. p. 125 

 (1857)). The few algse included in the collection are in Kew 

 Herbarium, but apparently were never published. No other algae 

 appear to have been gathered on the shores of the Kermadecs 

 until Mr. Oliver made his long stay on Sunday Island in 1908. 

 However, Dickie, in his report on the algae of the ' Challenger ' 

 Expedition, records Cystophora eloncjata as found floating in the 

 deep sea off Raoul (or Sunday) Island. We make further refer- 

 ence to this under Caryophyllum elongatum. Mr. Cotton, of Kew 

 Herbarium, has also received lately some marine algae from the 

 Kermadecs ; and it is with profit that we have compared the two 

 sets and exchanged views with him. 



Ulva Lactuca Linn., nos. 1334, 1340. " On rocks between 

 tidal marks, Meyer Island." 



Geogr. Distr. General. 



Ulva latevirens Aresch., no. 1341. Cast up on Denham Bay 

 Beach. 



Geogr. Distr. South Australia. Tasmania. 



Enteromorpha compressa Grev., nos. 1332, 1333. " On rocks 

 between tidal marks, Meyer Island." 



Geogr. Distr. N. and S. Atlantic. N. and S. Pacific. 



Cladop}iora fusca Martens, nos. 1318, 1348. " In rock pools, 

 Meyer Island." 



We have little hesitation in referring our plants to C. fusca, 

 though we have had no opportunity of seeing an authoritative 

 example of it. Martens' description is a little puzzHng in respect 

 of the branches, which are stated to be twice as thick above as at 

 base — a character which does not appear in the figure. Our 

 plants agree with Martens' figures, but attain larger dimensions, 

 our biggest specimen being three inches high. In Kew Herbarium 

 are other specimens from the Kermadec Islands, whicli were 

 collected during the visit of H.M.S. ' Herald ' in 1854. They bear 

 the name CladopJiora prolifera, but whether they were ever 

 published we do not know. The range of the species extends to 

 Ceylon, where it was collected by Ferguson. His specimens 

 (no. 86) are represented in tlie British Museum Herbarium. The 

 type-specimens were collected at Mampawa, on tlie west coast of 

 Borneo, and at Palal)uan. 



Geogr. Distr. Borneo. 



Vauchcria sp., no. 1308. Growing epiphytically. Meyer Island. 



c 2 



