424 Transactions. 



it Poa litorosa, the name Poa scoparia being preoccupied. T 

 assume that Poa litorosa is the off-island grass, which is not 

 known to extend to the main islands of New Zealand, and cut 

 out of Hooker's original species, the one here described. 



I formerly referred specimens of the true Poa litorosa, Cheesm., 

 given to me by the late Mr. T. Kirk, F.L.S., under the name 

 of Festuca scoparia, Hook. f.. and collected by him on the Auck- 

 land Islands, to my Poa chathamica. This mistake was due to 

 misunderstanding the true relations of Poa litorosa, Cheesm., 

 and the species here described. 



An accurate description of Poa litorosa is much needed, 

 but at present the material in the possession of colonial botanists 

 is insufficient for the purpose. 



Art. L. — Appendix to the List of Seaweeds of Norfolk Island. 



By R. M. Laing, B.Sc. 



[Read before the Philosophical Institute of Canterbury, 5th July, 1905. J 



In vol. xxxiii of the " Transactions of the New Zealand Insti- 

 tute " there appears a list of the seaweeds of Norfolk Island. 

 I have now a few niore species to add to that list. Of the two 

 species hitherto considered to be endemic, one, Plocamium 

 hamatum, J. Ag., has recently been found on the Australian 

 coast. Owing to an oversight in reading the proof, two species 

 already listed in the paper were reinserted in the addendum. 

 If these duplicates are removed from the list there remain thirty- 

 three already recorded. To this list six have to be added, 

 none of which are endemic, but they are all either Australian 

 or widely distributed. 



34. Caulerpa racemosa (Forsk.), W. van Bosse, var. Iceterirens 



(W. van Bosse). 



35. Bryopsis foliosa, Sonder. 



36. Hydroclathurus cancellatus, Bory. 



37. Dictyota ciliata, J. Ag., forma (dentibus sparsissimis et hie 



illic in phylla excrescentibus, ut in D. patens; ? = var. 

 humilis, Grunow, Samoa, i). 



38. Ulva mematoidea (Bory), Mont., var. angustior (Grim.) = 



U. fasciata, Delile. 



39. Cystophora uvifera (Aresch.), form without vesicles (? shallow 



water). 



I have again to thank Major Reinbold for his kind assistance 

 in the identification of the specimens. 



