1891.] D. Prain — The Vegetation of the Coco Group. 341 



339. . 



A second fungus of some interest is an Uredine tliat was found in 

 considerable quantity on Clerodendron inerme. This the writer has 

 met with, always producing the same characteristic effects on this 

 Clerodendron, in South Andaman, Little Andaman, and Car Nicobar, as 

 well as on G-reat Coco. The specimens were examined by the late Dr. 

 Barclay, but were found insufl&cient for determination. 



340. . 



A third fungus of note causes a " dry-rot " in the fallen trunks of 

 Mimusojos littoralis on the beach. The effect produced simulates in a 

 wonderful manner charring by fire ; it appears to be confined, so far as 

 the drift timber and wreckage on these islands is concerned, to Mimusops 

 and Quercus — the planks of a wooden vessel, apparently of oak, that had 

 been wrecked on Little Coco, being attacked like the Bullet- wood trees ; 

 Teak, Sundri and other logs were not affected. 



ALa^. 



341. Sargassum ilicipolium J. Agardh. 



In all the islands ; in great beds at the outer margins of the fringing 

 I'eefs and in the deeper water beyond ; the only really common sea- weed. 



Almost Cosmopolitan in the tropics ; not from Australia {Hemsl., 

 Report on Bot. of Admiralty Islands, p. 271). 



342. TuEBiNARiA ORNATA J. Agardh. 



In all the islands ; rather common both on coral and on sandstone 

 reefs. 



* Indian Ocean. 



343. Padina pavonia Gaill. 



In all the islands ; on both coral and sandstone. 

 Cosmopolitan in ti'opical seas. 



344. DiCTYOTA DiCHOTOMA Lamour. 

 Great Coco ; on coral reefs. 



Common in both north and south temperate seas, rarer in the 

 tropics. 



345. LiTHOTHAMNION POLYMORPHUM Aresch. 



Great Coco ; on coral reefs. 



Atlantic, Mediterranean, South Africa ; Chonos Archipelago. 



346. AcANTHOPHORA Thierii Lamour. 

 Little Coco ; pools on coral reefs. 

 Cosmopolitan in tropical seas. 



347. Jania tenella Kuetz. 



Great Coco ; on reefs, on Lithothamnion polymorphum. 



* Indian Ocean. 



