1893.] D. Prain — Flora of Nareondam and Barren Island. 83 



163. Brtum coronatum Schwa3gr. Nareondam (129); Barren Island 

 (79). Cosmopolitan in the tropics. 



xlix. LICHENES. xxxix. 



164. Collema nigrescens Achar. Nareondam (130), rather common ; 

 Barren Island (80), plentiful. 



Cosmopolitan. 



l. FUNGI.* xl. 



165. Poltporus australis Fries. Nareondam (131) ; Barren Island (81). 

 Cosmopolitan in the tropics. 



166. Poltporus xanthopus Fries. Nareondam (132). 

 Cosmopolitan in the tropics. 



167. Lenzites platyphyllus Cooke, Grevillea xiii. 1. Nareondam (132). 

 Malay Peninsula. 



168. Dedaelea griercina Fries. Nareondam (134) ; Barren Island (82). 

 Cosmopolitan. 



169. Peniophora paptrina Mont. Nareondam (135) ; Barren Island (83). 

 Cosmopolitan in the tropics. 



170. Hirneola polytricha Mont. Nareondam (136); Barren Island (84). 

 Cosmopolitan in the tropics. 



171. Thelephora incrustans Pers. Nareondam (137) ; Barren Island 

 (85). 



Cosmopolitan. 



172. Rhttisma, sp. Nareondam (138) ; Barren Island (86) ; on leaves 

 of Ficus brevicuspis. 



Andamans. 



ALG^E. xli. 



173. Calothrix pulvinata Ag. Barren Island (87) ; on stones in 

 the hot spring on the beach at Landing-place Cove. 



Cosmopolitan. 



174. Calothrix tasmanica Kg. Barren Island (88) ; on rocks in Led 

 of torrent on inside of outer cone to the south of the lava. 



Indo-China, Malaya ; Australia. 



§§§ Nature and Origin of the Flora. 



The list includes 174 species, of which 138 occur in Nareondam 



and 88 in Barren Island ; 86, or 62A°/ , of the Nareondam plants are 



absent from Barren Island, while 36, or 41%, of the Barren Island 



species do not occur in Nareondam; only 52 species — making 37f% of 



* Examined, and kindly named for the writer by Mr. G. Massee. 



