55. ANTROPIIYUM. 393 



3. A. immersum, Mett. MSS. ;/r. 2-4 in. 1., J-f in. br., narrowed gradually to an 

 acute point and at the base to a short stem ; texture thick ; no distinct midrib; 

 central areolce vertical, long and narrow ; veins distinctly raised on the upper 

 surface ; sori quite immersed, often forked. Hemionitis, Bory. A. pumilum, 

 Kaulf. Hk. # Grev. lc. t. 46. Hk. Sp. 5. p. 170. 



Hab. Mauritius, Bourbon, Malaya. 



4. A. coriaceum, "Wall. ; fr. 6-8 in. 1., |-| in. br., narrowed very gradually 

 from the centre to the base and an acute point ; texture very thick ; no midrib; 

 the areolce very long and narrow, very distinctly raised on the upper surface ; the 

 sori quite immersed, sometimes confluent. Hk. Sp. 5. p. 163. 



Hab. Himalayas, the Philippine and Malayan Isles. A. nanum, Fee, is as coriaceous in 

 texture, but not so plicate. In our specimens the fronds are oblong-spathulate, and only 

 1 in. 1., so that it is very doubtful whether the plant be not an undeveloped condition of 

 sonie of the other species. 



5. A. plantagineum, Kaulf. ; fr. 6-9 in. 1., l|-2 in. br., broadest one-third of 

 the way down, the point acute, the lower part narrowed gradually into a stem 

 1-4 in. 1.; no midrib; areolce 1-3 in. 1., J in. br. ; the sori copious, deeply 

 immersed, often uniting. ]3, A. angustatum, Brack. ; texture thinner ; fr. ligu- 

 late, 1 ft. 1., | in. br. ; st. 6 in. 1. Hk. Sp. 5. p. 170. A. Lessoni, Bory. Hk. 

 Sp. 5. p. 170. 



Hab. Ceylon, Himalayas, and Malay ; Philippine and Polynesian Isles. A.parvulum, 

 Blume, looks like a small narrow-fronded form of this. 



6. A. Cumingii, Fe'e ; fr. 18 in. ]., 1-1| in. br., ligulate, about equal in width 

 in the central half, narrowed very gradually to the base and an acute point, 

 with a black midrib in the lower quarter, the central areolce several inches long 

 and not more than \ lin. br. ; sori very slender, deep-sunk, often joining, the 

 edge of the furrow rather raised. Hk. Sp. 5. p. 167. 



Hab. Philippines, Owning, 416. According to Mettenius, this is a variety of the 

 Malayan A. callcefoliiim, Blume, and differs from the next by its narrower longer 

 rhizome-scales, and softer fronds narrowed gradually to the base. 



7. A. reticulation, Kaulf. ; f f . 6-15 in. 1., 1^-2 in. br., broadest about one- 

 'third of the way down, the point blunt or acute, the lower part mirrowed very 

 gradually to the base or a short compressed stem ; midrib scarcely any ; areolce 

 several in. 1., 1-1^ lin. br., very distinctly raised on the upper* surface ; sori 

 copious, often joining, raised above the surface. ILk. Sp. 6. p. 169. 



Hab. Himalayas, Ceylon, and Malaccas to Aneiteum and Queensland. 



8. A. semicostatum, Blume ; fr. 6-18 in. 1., 2-4 in. br., broadest about one- 

 third of the way down, narrowed to an acute point and very gradually to the 

 base or a short stem, the edge entire, with a distinct blackish midrib in the lower 

 half, the central areolce often 2-3 in. 1., \ in. br. ; sori copious, often joining, 

 rising above the surface. H. Sp. 5. p. 168. A. latipes, Kunze. 



Hab. Ceylon, Malaccas, Philippines, and Polynesian Isles. Species 2 to 8 come very 

 near to one another, and cannot be regarded as clearly distinct. 



** Sori superficial or but slightly immersed. Sp. 9-16, 



9. A. ensiforme, Hk. ; fr. 6-12 in. 1., f- in. br., ligulate, the point acute, the 

 edge entire, the lower part narrowed very gradually from halfway down to the 

 base ; midrib broad, obscure, lost upwards ; veins sunk, forming 3-4 rows of 

 irregular hexagonal areolae between the midrib and edge ; sori raised above the 



3D 



