BOTANY OF PEENANDO NOEONHA. 81 



Ctathus steiatus, Hoffm. 



Ridley, Lea, and Bamage ! Sapate woods. 



Geogr. Distr. Europe, N. America, and Tropical Africa. 



Pteenomtcetes. 

 Claviceps puepueea, Tul. 

 Ridley, Lea, and Bamage ! 



On Genchrus echinatus in the coco-uut plantation, Sueste. 

 Oeogr. Distr. Europe, North America, and N. Zealand. 



DOLDINIA CONCENTEICA. 



Ridley, Lea, and Ramage ! Sapate woods. 

 Geogr. Distr. Cosmopolitan. 



IJSTULINA VULGAEIS, Tul. 



Ridley, Lea, and Ramage ! 



Geogr. Distr. Europe, America, Ceylon. 



Xylaeia polymoepha, Grev. 



In the Sapate woods on rotten trees. 



Geogr. Distr. "Whole world. 



DIATOMACE.ffi. 



By John Eatteay, M.A., B.Sc. 

 (Communicated by H. N. Eidley, M.A., F.L.S.) 



The following list of DiatomacecB must be regarded as giving 

 but a very imperfect conception of this department of the flora 

 of Fernando and, indeed, of the collections made during the 

 present Expedition. The materials entrusted to me for examina- 

 tion by Mr. H, N. Ridley consisted of : — a few small samples of 

 calcareous Algse, chiefly Litliotliamnion and Galaxaura, in the dry 

 state ; similar but larger samples of tlie same genera preserved in 

 spirit along with other Ghlorophycece and RhodophyeecB ; a small 

 sample of sediment from various gatherings, also in spirit ; and 

 dried specimens of Ceramia with shell-fragments. Two samples 

 of guano from Rat Island off" Fernando Norooha were also ex- 

 amined, and the species observed in these are given in a separate 

 list. No surface-gatherings, which might be expected to yield 

 many ChcetocerotidcB, Rhizosolenice, and Coscinodisci, such as are 

 abundant on the opposite shores of Africa and in the Grulf of 

 Guinea, were taken. 



LINN. JOTIEN. — botany, VOL. XXVII. G 



