











BOTANY OF FEBffANDO NOBOtfHA. 



tS 



squamis imbricatis rotundatis ultra marginem paulum exstantibus 

 purpureis margine pallido. 



Sab. loco humido umbroso Tangle Bock, Insula Fernando 

 Noronha (S. N. Ridley, Aug, 1887). 



Dimensions of frond, 5x2; spore 0*1 X 0*6 mm. 



This species falls into the scale-bearing section of BischofPs 

 subgenus Lichenoides. It most resembles R. limbata, Bischoff, 

 but differs in the less acute, non-ascending margin of the thallus, 

 the colourless border of the scales, and the direction, which is at 

 right angles to the margin of the thallus. The scales spring 

 from the purple membrane, which covers the underside of the 

 thallus for about one half of the distance from the margin to the 

 median line, and exhibits obscure transverse folds. The scales 

 are expanded laterally so as to overlap one another in an imbri- 

 cate manner. The laciniaB are emarginate, devoid of papillae, and 

 still united to the withered main thallus ; they bear the fruit 

 beneath the upper surface in the median groove. Several arche- 

 gonia, but only one ripe fruit has been observed. Several 

 minute closely involute thalli occur beneath the older plants. 

 The latter are aggregated together, and are very firmly attached 

 to the soil by innumerable short hairs. 































i 



■ 











m 







ALGJE. 



M. MlXBItAY 





The Algae collected by the « Challenger ' 



Expedition at Fernando 

 Professor TK^kio f Linn. Soc. 



Journ. Bot. vol. xiv. p. 363) have been included for the purpose 

 of completing the enumeration of Alg© from this island. 





* 



Flobide^. 



Cekteoceras clavttlatum, J. Ag. 



Ridley, Lea, and Ramage ! 



Geogr. Bistr. Throughout tropical and subtropical seas. 



Teedii. Lam 



Ridley, Lea, and Ramage ! 



Mediterranean 







. 













NIA ENTEBOMOBPHA. Hart) 



' Challenger. 



West 









. 













' 











' 













