55. ANTROPnYUM. 393 



3. A. immcrsum, Mctt. MSS. ;/r. 2-4 in. 1., ^-| in. br., ncarrowed gradually to an 

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

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

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

 KauJf. Ilk. 4' Qrcv. Ic. t. 40. Hk. ^p. 5. 2^. 170. 



Hab. Mauritius, Bourbon, Malaya, 



4. A. coriaceum, Wall. ; fr. 0-8 in. 1., ^| in. br., narrowed very gradually 

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

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

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



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

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

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

 some of the other species. 



5. A. plantagineum, Kaulf. ; fr. G-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; areolae 1-3 in. 1., \ in. br. ; the sori copious, deeply 

 immersed, often uniting. — /3, A. anpustatum. Brack. ; texture thinner ; fr. ligu- 

 late, 1 ft. 1., I in. br. ; st. G in. I. — Hk. Sp. 5. p. 170. A. Lessoni, Borj/. Hk. 

 Sp. 5. 2'>- 170. 



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

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



6. A. Cumingii, Fe'e ; fr. 18 in. 1., lA^ 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 areolw 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, Cvming, 416. — According to Mettenius, this is a variety of the 

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

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



7. A. reticidafum, Kaulf. ; f'-. 6-15 in. 1., H-2 in. br., broadest about one- 

 'third of the way down, the point blunt or acute, the lower part n.'irrowed very 

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

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

 copious, often joining, raised above the surface. — Hk. Sp. 5. p. 169. 



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



8. A. semicostatum, Blume ; fr. G-18 in. I., 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 arcolce 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. etfkiforme, Hk. ; fr. 6-12 in. 1., |-| 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 



