discovered or described since 1874. 205 
31*. I*, mediocris, Fourn., in Ann. Sc. Nat. sdr. 5, XVIII, 336. 
New Caledonia, Balansa. Not seen. 
32*. L. viridis, Colenso, Fil. Nov. New Zeal. 14. New Zealand. 
Allied to L. microphylla , Sw., from which it differs by much 
closer regularly cuneate final segments, and sub-davallioid sori. 
Subgenus Synaphlebium. 
37. L. lobata, Poir. I cannot separate specifically L. ambigens, 
Cesati, Fil. Becc. Polyn. 
Subgenus Diellia. 
The late Dr. Hillebrand, in his recently-published Flora of the 
Hawaian Islands, has fully re-described the species and varieties of this 
curious subgenus, which is peculiar to the Sandwich Islands. To 
the species in our Synopsis Filicum he adds the following, viz : — 
Ii. centifolia, Hillebr. p. 621. 
L. laciniata, Hillebr. p. 621, with 2 varietes. 
L. Alexandri, Hillebr. p. 622, with 3 varieties. 
L. Knudsenii, Hillebr. p. 623, with a variety. 
Genus 21. Adiantum Linn. 
Kuhn, in Jahrb. Berlin. Bot. Gart. vol. I. p. 337, has published a 
valuable monograph of this genus. He characterises briefly 113 
species, many of which are dealt with as varieties in the Synopsis 
Filicum. He proposes two subgenera, viz.— (1) Euadiantum , spo- 
rangia confined to the veins ; and (2) Adiantellum, sporangia 
occupying the intervening parenchyma as well as the veins. 
1. A reniforme, L. Besides the type, which inhabits Madeira 
and the Canaries, and var. asarifolium , Willd., which inhabits 
Mauritius and Bourbon, a third subspecies, crenatum. Baker, 
has lately been found by Mr. J. T. Last in the North-East of 
Madagascar. It differs from the others by its more distant 
sori and crenate edge of the frond. 
3*. A. Balfourii, Baker, in Hook. Ic. tab. 1630. Socotra, Balfour. 
Differs from all the forms of lunulatum by its equilateral 
shortly-petiolate pinnae. 
3*. A. Balansae, Baker, in Journ. Bot. 1890, 262. Tonquin, 
Balansa } 134. Near the African A. Metlenii, Kuhn. 
P 
