. Transactions of the Royal Society of New Zealand. t approaches C. cyclicum, Lundell, especiallywhen elliptical with rounded segments, but it is smaller, hasa wider sinus at the constriction, with more conspicuous grooves on the frond, and the row of granules at the baseof each segment, producing the inflation in side-view, is quitedistinctive. Lundell gives two variant figures of C. cyclicumyneither of which has trapezoidal segments. C. cyclicum, , Nordstedt, is more angular than Lundells type, butits edges are irregularly incised, and it has not the rows ofgranules which produce
. Transactions of the Royal Society of New Zealand. t approaches C. cyclicum, Lundell, especiallywhen elliptical with rounded segments, but it is smaller, hasa wider sinus at the constriction, with more conspicuous grooves on the frond, and the row of granules at the baseof each segment, producing the inflation in side-view, is quitedistinctive. Lundell gives two variant figures of C. cyclicumyneither of which has trapezoidal segments. C. cyclicum, , Nordstedt, is more angular than Lundells type, butits edges are irregularly incised, and it has not the rows ofgranules which produce the inflations of our species. I have ventured to attach to this plant the name of B. Turner, who has been kind enough to give me muchhelp. Cosmarium sub-cyclicum, sp. nov. Plate III., fig. 29. In 1882 ( Trans. vol. xv., p. 241) I reported this plantunder the name G. cyclicum var. ampliatum. Professor Nord-stedt suggests to me that it should rather be a new species, ^rmtsaijltons l«w |^alaijii Hasfifats, Vol. xxi. J h j) J) m*. oc Jj. ^Fig24. Fig 25. NEW ZEALAND DESM/D/ECE. ©rmmnfitots Iftatt jfyHhtyk $tt$iiftlte, Vol. XXI. PI. III.
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