208 Macteay Memorian Votume. 
Of the seventeen genera so characteristic of the Austro-Polynesian region, four 
only are absent from New Zealand, viz., Baloghia, Pseudomorus, Gettonoplesium and 
Araucaria,; the first predominates in New Caledonia, but two species of it have 
extended to Continental Australia, one of them being widely distributed in Polynesia; 
Gettonoplestum is a monotypic genus differing by inflorescence from Lustrephus, a 
monotypic Australian genus, and from Lauzariaga, a small genus belonging to the 
Andean and New Zealand regions; Avaucarda is usually regarded as an Andean 
genus spreading westward as far as Eastern Australia; Drzmys is of nearly equal 
value with Araucaria ; and Coprosma is pre-eminently a New Zealand genus. On 
the other hand Metrosideros, Myoporum, Microtis and Dianella indicate closer 
affinities with Australia than with any other region of the Australasian Province. 
Of the four Australian genera common to Norfolk Island, Zagunarva is mono- 
typic—scarcely perhaps sufficiently distinct from A/zézscus (according to Bentham), 
a very large genus widely dispersed throughout the tropics and extending to warm 
temperate regions—and may be equally claimed by Norfolk Island or Australia ; 
Bosistoa, comprising one species peculiar to Australia and one restricted to Norfolk 
Island, perhaps because of its alliance with J/elicope may be regarded as of 
Polynesian origin ; Lorvonza is, with the exception of the peculiar species in Norfolk 
Island, restricted to Australia; Ayvzostemon (in the extended sense used by Baron 
von Mueller) is a large genus with one species each in New Caledonia and New 
Zealand and two in Norfolk Island 
list of Australasian genera. 

a distribution suggestive of its inclusion in the 
In the discussion of the generic affinities of the flora of Norfolk Island, we may 
leave out of consideration those genera of cosmopolitan distribution and those of 
Oriental origin. In regard to those genera of Australasian origin, the major number 
of them seem to be nearly equally balanced between Australia and New Zealand, 
but in the extra-Australian genera Streblorrhiza, Melicytus, Meryta, Phormium and 
Rhopalostys turn the scale in favour of New Zealand as against Boronta and 
E-riostemon for Australia. 
V.—GenerA oF Prants In Lorp Howe Istanp. 
Affinities of the Extra-Australian Genera.—The genus Carmichaelia contains 
nine species inhabiting New Zealand and one endemic in Lord Howe Island. 
Colmeivoa is a peculiar monotypic genus, the author of which approximates it to 
Carpodetus, a monotypic genus inhabiting New Zealand. Acicalyptus comprises the 
Lord Howe Island plant and two other species belonging to Fiji. Mega is another 
peculiar monotypic genus, having its nearest ally in Rhabdothamnus, which is 
