MAEIXE ALG^ OF THE SEALAEK ' EXPEDITION. 125 



Chondeia, C. Agardh. 



1. CnoNimiA PUMiLA, Tick. (Plate 12. fig. 8.). 



Vickers, "Liste des algues marines de la Barbade/' in Ann. d. Sc. Nat. 9"" serie, Bot. vol. i. 

 p. 45. 



Chagos Archipelago, Diego Garcia, no indication of depth; in alcohol. 



Distribution. Barbados. 



On comparing the Chondria from the Chagos Archipelago with Ch. pimila, Vick . 

 from Barbados, I could detect no character whereby to distinguish it. I conclude, 

 therefore, that they belong to one species even though the distance between the two 

 localities is very great; but perhaps this minute plant will be detected later in inter- 

 localities. Miss Vickers intended to give a figure, but her untimely death 



venmg 



prevented her from carrying out this intention. I have there tore g 

 of the Chagos plant. 



tr 



imm 



2. Chondria simpliciiiscula, n. sp. (Plate 12. figs. 9, 10.) 



Thallo filiformi, repente, intricate, pauci ramoso ; ramis interdum oppositis, plcrum(iuc 

 singulis ; apice filorum truncate, cellulis apicalibus in fovea crateriformi 



3rsis. Cellula centrali et quinque cellulis periccntralibus uno aut duobus 



stratis cellularum corlicalium circumdatis. Cellulis periphericis desuper visis ad 

 apicem hexagonalibns, in parte inferiore cum pariete undulata et ea re moniliformi. 

 Organis fructificationis non visis. 

 Aldabra, reef, on Laurencia papillosa. 



This small species is characterized by its filaments being mostly horizontally disposed, 

 sparingly branched, and bearing the tetrasporangia not in special stichidia but at the 

 apex of ordinary branches, which ultimately may grow out into long vegetative shoots 



when the formation of tetraspores has ceased. , . -. v i i 



After havin- been dried Ch. simpliciuscula adhered firmly to the alga on which it liad 

 spread itself, but I detected no union between the two plants. It belongs to the section 

 Ccelochondria, Falk., as is clearly shown by fig. 10 on PL 12. 



•S' 



PoLTSiPHONiA, Greville. 



1. POLTSIPHONIA spec 



Praslin, reef, on Eypnea pannosa, 



A frao-mentary specimen that I was unable to name 



EoscHEBA, Sonder. 



1. EOSCHERA GLOMERTJLATA (Ag.), n. COmb. 



Tolypiocladia glomerulata, Schmitz, Marine Florid, von Deutsch O.t-Afrika. 1895, p. 160. 



Seychelles, Long Island ; dry specimen. 



Distribution. Zanzibar; Indian Ocean; Malay Ai'chipelago. 



