FLORA VITIENSIS. 377 
oblongis, pinnulis petiolulatis linearibus angustato-acuminatis crenatis, basi rotundatis, subtus 
paleis minutis hinc inde adspersis, acumine acute serrulatis; venis furcatis v. simplicibus ; venulis 
secundariis e sinu crenæ decurrentibus nullis aut obscuris; soris lineari-ellipticis, contiguis, infra 
marginalibus.—4. evecta, Brack. U. S. Expl. Exped. Filices, p. 310.— Viti (Seemann! n. 789; 
Milne! Greffe! U. S. Expl. Exped.). Also from Aneitum, New Hebrides (M'Gillivray !), and 
Tahiti (Nelson! Barclay ! n. 3334). 
LVI. Gymnotheca, Presl, Suppl. Tent. Pter. in Abhandl. Bohm. Gesellsch. ser. 5. vol. iv. 
p. 272. Sporangia biseriata, interne rima lineari-elliptica dehiscentia, in soros sessiles oblongos 
thecæformes bivalvos absque indusio connata. Venæ simplices v. furcatæ, liberæ.—Filices rhizomate 
crasso globoso, basin squamæformia stipitum gerente; frondium amplis, bipinnatis, pinnulis articu- 
latis.— 8/разіа, Presl, l. c. 275. 
1. G. Douglassii, T. Moore, Ind. Fil. p. 121; stipitibus crassis, supra canaliculatis; frondi- 
bus ovatis, glaberrimis, bipinnatis; pinnis alternis, linearibus, acutis, pinnulis sessilibus articulatis, 
oblongo-lanceolatis, serratis, coriaceis; soris oblongis, inframarginalibus.—S/ibasia Douglassii; 
Presl, 1. c. p. 276. Marattia Douglasii, Baker, Syn. Fil. p. 441. 
LVII. Marattia, Swartz, Nov. Gen. et Sp. Pl. p. 128. Sporangia biseriata, interne rima 
lineari dehiscentia, in soros indusiatos sessiles oblongos thecæformes bivalvos connata. Venge sim- 
plices v. furcatæ, liberæ.  Indusium lineari-ellipticum v. ovale, scariosum, fimbriatum, persistens.— 
Filices rhizomate crasso globoso v. caudiciforme, basin squamiformia stipitum gerente; frondibus 
amplis, bi-tripinnatis, pinnulis articulatis.— Myriotheca, Commers. in Juss. Gen. Pl. p. 15. 
The following species has also been found in tropical Polynesia :—M. attenuata, Labill. Sert. Austro- 
Caled. p. 9. t. 13, 14. From New Caledonia (Labillardiére, Vieillard). Also from Aneitum, New Hebrides 
(M'Gillivray !). 
1. M. sorbifolia, Swartz, Syn. Fil. p. 168; frondibus bipinnatis; pinnis alternis, pinnulis 
sessilibus, alternis v. suboppositis, lanceolatis, acuminatis, margine subintegris v. serratis, apicem 
versus serratis, acumine grosse serratis; venis simplicibus v. furcatis ; soris oblongis, a margine dis- 
tantibus.—Myriotheca sorbifolia, Bory, Voy. vol. i. p. 267.—Viti (Seemann! n. 788; Milne !). 
Also from Aneitum (M'Gillivray ! C. Moore!) and New Caledonia (M'Gillivray |). 
SuBoRbo VI. OPHIOGLOSSACEÆ. 
The following species of this Suborder occur in tropical Polynesia :—1. Botrychium subbifoliatum, 
Brack. U.S. Expl. Exped. Filices, p. 317. t. 44. f. 2, from Sandwich Islands (Nelson! Maerae! U.S. 
Expl. Exped.). 2. Helminthostachys Zeylanica, Hook. Gen. Fil. t. 47, from New Caledonia (M'Gillivray ! 
Vieillard). 
LVIII. Ophioglossum, Linn. Syst. Nat. ed. 1. Sporangia biseriata, margine spicæ com- 
pressæ adnata, horizontalia, connata, globosa, in valvas duas æquales hemisphæricas dehiscentia. Spica 
fructifera frondi opposita, linearis, pedunculata, mucronata. Venæ reticulate.—Filices rhizomate 
subgloboso, frondibus subcarnosis sterilibus simplicibus v. furcatis.—Ophioderma, Endl. Gen. PI. 
p. 66. Rhizoglossum, Presl, Suppl. Tent. Pter. p. 307. Cheiroglossa, Presl, 1. c. p. 316. 
Besides the species described, the following have been found in tropical Polynesia :—1. O. ellipticum 
Hook. and Grev. Ie. Fil. t. 40 A, from the Sandwich Islands (U. S. Expl. Exped.). 2. O. concinnum, Brack. 
U.S. Expl. Exped. Filices, p. 315. t. 44. f. 1, from Sandwich Islands (U.S. Expl. Exped.). 3. O. reticula- 
tum, Linn. Sp. Pl. p. 1063, from Samoa (U. S. Expl. Exped.). 
