\I\I;INI LLG i 01 Mir BOOTTIBB N \TIONAL AM ML n i xi'KWTloN. 79 



thin-walled great interior cells (coll.i irevocnbly when dry), we felt that we were 



dealing with a new genus allied t,. (/'m-//ma, and we gave it the nitme of /. 

 Subsequently we received from Dr Kudino.se Brown a more complete plant, gathered in 

 the South ( >rkney.s, which with a few other alga) had been overlooked in the Scot in, until 

 that gallant ship was cleared out previous to being sold. Thin fine .specimen bore ten 

 fronds, some of them sterile and having the structure of Leptosarca, and others tetra- 

 sporiferous with large cruciate tetraspores, thicker-walled internal cells, and a cortex 

 of short chains of cells arranged perpendicularly to the surface of the frond. Upon 

 finding these characters in the spomngiferous fronds, we thought it advisable to transfer 

 the species to Cfracilaria, even though the conclusive evidence of the cystocarps is 

 still lacking. The finest examples of this species that we have seen were shown to us by 

 Dr Skottsberg, who collected them during the Swedish South Polar Expedition. 



In certain parts of the frond of G. simplex we noticed small filaments creeping 

 round tho cell-walk Reinsch (loc. cit. t p. 413, tab. xv. figs. 11-13) records two species 

 ft from South Georgia, endophytic in other algae; but our plant does not 

 agree with these, nor indeed with any other species of the genus. We have only the 

 vegetative filaments of our endophyte, and we hesitate, therefore, to give any definite 

 opinion on it. Since, however, the alg from South Orkneys are few and interesting, 

 it is worth while recording it, as it may occur among other Antarctic collections. 



21. EPYMKNIA, sp. Scotia Bay, South Orkneys, 9-10 fathoms, May 1903. 



Two s|>ecimen8 without fruit. They resemble E. obtusa in general habit and 

 structure, but they lack the midrib in the base of the flalx-Hate branches. The length 



of the midrib seems, however, to be a variable character in E. obtusa. 

 4 



22. PLOCAMIUM HUOKBRI, //an'. Scotia Bay, South Orkneys, 9-10 fathoms, 

 August 29, 1903; April 1903; May 1903. 



The last specimen is so covered with diatoms as to be unrecognisable until it 

 is cleaned. 



Geographical Distribution Kerguelen, Heard Island, South Georgia. 



23. P. OOCCINBUM, Lyni/h. Scotia Bay, South Orkneys, December 1903; 9-10 

 fathoms, May 1903. 



Geographical Distribution. Cosmopolitan. 



24. HYOROLAPATHUH STEPHANOCARPDM, A. and E. S. '-v/ r m Journ. of /M.xliii., 

 1905, p. 195, tab. 472, figs. 5-7. 



Frons fruticulosa 15-30 cm. aha irregulariter dichotoma 34 nun. luta valde costata 

 alata, ala pinnativenia saepe destructa, prolificationes numcrosas lanccolato-lineares 

 costatas pinnativenias, venis oppositis conspicuis, monostromaticas usque ad 32 mm. 

 longas et 4 mm. latas, e costis emit tens. Cystocarpia adparenter pedicellata, revera in 

 foliolis minutis transformatis e costa emcrgentibus sessilia, trichomatihus pluribus 

 instruct*. (Figs. 12-14.) 



