REPORT ON THE BOTANY OF THE ISLANDS OF THE SOUTHERN OCEAN. 273 



This was not in the set of De l'lsle's plants sent to Kew, and we have only seen speci- 

 mens from the Tristan da Cuuha group ; but we have no reason to doubt the correctness 

 of Fournier's determination ; and, if correct, it is one more link in the chain of evidence 

 tending to prove the common origin of the vegetation of these distant islands. 



Nephrodium (Lastrea) fiilfx-mas, Rich. 



Nephrodium (Lastrea) filix-mas, Rich, ex Desv. in Mem. Soc. Linn. Par., vi. p. 260 ; Hook., Sp. Fil., 

 iv. p. 116 ; Hook., Fil. Exot., t. 98 ; Hook., Ic. Fil., t. 234 ; Hook, and Bat, Synop. Fil., p. 272. 



Nephrodium (Lastrea) antarcticum, Baker in Journ. Linn. Soc. Lond., xiv. pp. 479 et 480. 



Aspidium antarcticum, Foum., et A. dilatatum, Fournier in Comptes rendus, 1875, lxxxi. p. 1140? 



Aspidium opposition, Kanlf., var. indusio minuto, Mett. in Reise der Novara, Bot., i. p. 218, et 

 Reichardt in Yerhandl. d. k. k. zool.-bot. Gesellsch. Wien, xxi., Abhandl. p. 30? 



Amsterdam Island. Dc I'Isle. St Paul Island. Sir G. Staunton; in humid 

 situations all over the island— Jelinek. 



At Mr Baker's request we reduce his Nephrodium antarcticum founded on an 

 imperfect specimen in the Herbarium of the British Museum collected by Sir G. Staunton. 

 Since describing that he has had an opportunity of examining a specimen collected by 

 De I'Isle, and sent to Kew from the Paris Herbarium under the name " Aspidium dilata- 

 tum, Swartz." He recognises it as a better specimen of the same species as his Aspidium 

 antarcticum, and regards it as a variety of Nephrodium filix-mas with compound fronds 

 similar to the var. elongatum of the Synopsis Filicum. 



Neph rodium filix-mas is widely spread, and common in tropical and South Africa 

 and the Mascarene Islands ; yet it is noteworthy that it does not extend into extratropical 

 South America, nor is it represented in Australia, New Zealand, or any of the other islands 

 of the Southern Ocean. 



Aspidium coriaceum, Swartz. 



Aspidium coriaceum, Swartz, Prodr. Fl. Ind. Oca, p. 133, et Synop. Fil, p. 57; Hook, and Bak., 



Synop. Fil., p. 254. 

 Polystichum coriaceum, Schott in Presl Tent., p. 84 ; Fonrnier in Comptes rendus, 1875, lxxxi. p. 1140. 



Amsterdam Island. — Abundant, fronds three feet high — De I'Isle. 



Widely diffused in the southern hemisphere, chiefly in the extratropical regions. 



Aspidiurn (Polystichum) mohrioides, Bory. 



Aspidium (Polystichum) mohrioides, Bory in Duperr. Voy. Coquille, Bot. Crypt., p. 267, t. 35 ; Hook, 

 f., FL Antarct., p. 392, t. 149; Hook., Sp. Fil., iv. p. 26; Hook, and Bak., Synop. Fil, p. 252. 

 Potystichum mohrioides, Presl, Tent., p. 83; Fournier in Comptes rendus, 1875, lxxxi. p. 1140. 



Amsterdam Island. — Beginning at about 1400 feet, and ascending very little higher — 



De risle. 



California ; Chili ; Patagonia ; Tierra del Fuego ; Falkland Islands, and Marion Island. 



(BOT. CHALL. EXP. PART II. 1884.) B 35 



