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Volume 6, 1873
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Art. XXXVII.—List of the Algæ of the Chatham Islands, collected by H. H. Travers, Esq., and examined by Professor John Agardh, of Lund. Communicated

[Read before the Wellington Philosophical Society, 1st September, 1873.]

Early last year I was entrusted by Mr. H. H. Travers with a collection of Algæ, obtained by him with a large number of other plants during his second visit to the Chatham Islands. I was glad to induce my friend Professor Dr. Agardh, of Lund, to undertake the laborious task of the examination of these Algæ, as here, not only the Museum material for comparison of this kind of plants, but also the extent of our libraries for phycologic studies, are quite inadequate; and besides the systematic determination requires great circum-spectness, many Algæ being of wide and much interrupted oceanic distribution. Moreover, no one could have brought to bear on this investigation the unrivalled experience of the great phycologist of Lund, gained after life-long special researches, which came to him as an inheritance from an illustrious parent. Dr. Agardh had already, at my request, examined the few Algæ brought by Mr. Travers from the Chatham Islands in 1864. The latter gentleman, encouraged by the well-proved discovery of a few new species on that occasion, effected last year a far more extensive search. The result has been that he brought together 46 genera and 62 species of these kinds of oceanic plants; and it is further gratifying to observe that he thereby added now again 2 genera and 10 species to the New Zealand flora, and indeed to science. Of the whole series a list is appended, arranged in accordance with the sequence adopted in Dr. Hooker's handbook. Diagnoses of the new generic and specific forms will soon be published in Sweden by Dr. Agardh.

It is, however, not likely that Mr.Travers' creditable exertions have already rendered known all the sea plants of this order occurring on the shores of the Chatham group; on the contrary, it may be expected that settlers on the various islands, able to watch what the gales may cast ashore at various seasons, or equally able to effect dredging at various places, will still largely add to the number of the Algæ now recorded from thence. It is also to be hoped that the enthusiastic young naturalist, to whom we mainly owe our knowledge of the vegetation of the Chatham Islands, will soon gain a new and fruitful field for a continuation of his important exertions.

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List of Algæ.

  • Sargassum

  • plumosum, Ach. Rich.

  • —— a species allied to S. sinclairii, J.H. and Harv.

  • Carpophyllum

  • phyllanthum, J. H. and Harv.

  • maschalocarpum, J. H. and Harv.

  • Marginaria

  • urvilleana, Ach. Rich

  • Cystophora

  • scalaris, J. Ag.

  • distenta, J. Ag.

This, by a writing or printing error, was called C. dissecta in Trans. N.Z. Inst., Vol. III., p. 214.

  • Landsburgia

  • quercifolia, J. H. and Harv.

  • myricifolia, J. Ag.

  • Fucodium

  • gladiatum, J. Ag.

  • Carpomitra

  • halyseris, J. H. and Harv.

  • Ecklonia

  • radiata, J. Ag.

  • Zonaria

  • turneriana, J. Ag.

  • Dictyota

  • kunthii, Ag.

  • Adenocystis

  • lessonii, J. H. and Harv.

  • Sphacelaria

  • paniculata, Suhr.

  • Rhodomela

  • traversii, J. Ag., n. sp.

  • Polysiphonia

  • lyallii, J. H. and Harv.

  • muelleriana, J. Ag.

  • ramulosa, Harv.

  • Or a species closely allied to it.

  • Polyzonia

  • incisa, J. Ag.

  • On Pterocladia lucida.

  • Champia

  • novæ-zealandiæ, Harv.

  • Laurencia

  • urceolata, J. Ag., n. sp.

  • thyrsifera, J. Ag., n. sp

  • Dactylotus

  • oblongifolius, J. Ag.

  • (Cladhymenia oblongifolia, Harv.)

  • Amphiroa

  • corymbosa, Harv.

The identity with Decaisne's South African plant doubtful.

  • wardii, J. Ag.

  • Jania

  • cuvierii Decaisne.

  • Nitophyllum

  • palmatum, Harv.

  • Gracilaria

  • flagelliformis, J. Ag., n. sp.

  • Caulacanthus

  • spinellus, Kuetz.

  • Pterocladia

  • lucida, J. Ag.

  • ApophlŒ

  • lyallii, J. H. and Harv.

  • Wrangelia

  • lyallii, Harv.

  • Rhodymenia

  • corallina Grev.

  • Hymenocladia

  • lanceolata, J. Ag.

  • Rhodophyllis

  • acanthocarpa, J. Ag.

  • (Callophyllis acanthocarpa, Harv.)

  • Plocmium

  • coccineum, Lyngb.

  • Gymnogongrus, sp.

The collected specimens are sterile.

  • Callophyllis

  • hombroniana, Kuetz.

  • Gigartina

  • angulata, J. Ag., n. sp.

  • marginifera, J. Ag.

  • decipiens, J. H. and Harv.

  • radula, J. Ag.

  • Epymenia

  • obtusa, Harv.

Perhaps distinct from the South African plant.

  • Chrysymenia

  • linearis, J. Ag.

  • Grateloupia

  • caudata, J. Ag., n. sp.

  • Ceramium

  • nodiferum, J. Ag., n. sp.

  • stichidiosum, J. Ag., n. sp.

  • Centroceras

  • clavulatum, Montagn.

– 210 –
  • Ptilota

  • formosissima, Mont.

  • Pandorea

  • traversii, J. Ag., n. g.

  • Griffithsia

  • sonderiana, J. Ag., n. sp.

  • antarctica, J. H. and Harv.

  • gracilis, Harv.

  • Or an allied species in a sterile state.

  • Ballia

  • brunonis, Harv.

  • scoparia, Harv.

  • Caulerpa

  • furcifolia, J. H. and Harv.

  • Codium

  • tomentosum, Ag.

  • adhŒrens, Ag.

  • Bryopsis

  • prolifica, J. Ag.

  • Ulva

  • rigida, Ag.