discovered or described since 1874. 25 



31*. L. mediocris, Fourn., in Ann. Sc. Nat. se"r. 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 Diollia. 



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 : 



L. 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. (i) Euadtantum, 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. 



