DERIVATION OF THE FLORA AND FAUNA 413 



Polyp odium L. 



scolopendria Burm. Palaeotrop., wide-spread; 

 Polystichuin Roth. 



Fuentesii Espinosa. Belongs to the P. vestitum assemblage, 

 Vittaria Sm. About 80, pantrop.-subtrop. 



elongata Sw, Indomal.— Polyn.-Austral. 



Ophioglossaceae. 



Ophioglossu7n L. 



lusitanicum L. subsp. coriaceum (Cunn.) Clausen. Boliv.-Chile, Austral., Tasm., 

 N. Caled., N. Zeal. 



reticulaiwn L. S.E. As., Philipp., N. Guin., Melan.-Polyn., east to Mangareva; 

 Mascarene Is. 



Psilotaceae. 



Psilotum Sw. 2 wide-spread sp. 

 jiudurn (L.) Griseb. Pantrop. 



Fifteen species are listed, 4 of them endemic (26.6%), the endemic variety 

 of Asplenium adiantoides not counted. 



Geographical elements. 



In my earlier subdivision {2jg) the following groups were distinguished. 



1. Australian-Polynesian element (6). 



a) Species found elsewhere: Asplenium adiantoides, Elaphoglossum tahitense, Micro- 

 lepia strigosa, Vittaria elongata, Ophioglossum coriaceum. 



b) Endemic: Doodia paschalis. 



2. Palaeantarctic element (i). 



Found elsewhere: Asplenium obtusatum. 



3. American element (i). 



Endemic: Dryopteris Espinosai. 



4. Wide-spread tropical element (4): Dryopteris gongylodes and parasitica (=dentata), 



Polypodium phymatodes, Ophioglossum reticulatum. 



The list contains 12 species; two have been reported later and some nomen- 

 clatural changes have been made. A new geographical arrangement follows here. 



I. Palaeotfopical element. — i i sp. (733%). 



1. Paiitropical (3): Dryopteris gongylodes and dentata, Psilotum nudum. 



2. Palaeotropical (i): Asplenium adiantoides (endemic variety). 



3. Malaysian- Poly 7iesian (6). 



a. Endemic: Elaphoglossum Skottsbergii. 



b. Not endemic: Davallia solida, Microlepia strigosa, Polypodium scolo- 

 pendria, Vittaria elongata, Ophioglossum reticulatum (also Mascarene Is.). 



4. Aiistralian-Polynesia7i (i). 

 Endemic: Doodia paschalis. 



