n tijt Ckssifiralion of llje 



By OEOEGE BREBNER, 

 Lecturer in Botany^ University College^ Bristol. 



r I iHE small, though interesting, group of the Brown 

 -L Sea-weeds, known as the Tilopteridacese, consisted 

 until recently of the three well-known genera Tilojjteris, 

 Haplospora^ and 8caplios2)07'a^ but in 1895 Kuckuck ^ sug- 

 gested that Haplospora Vidovichii (Kiitz.) Bornet should 

 be renamed Heterospora Vidovichii on account of his 

 discovery of uni-locular zoosporangia in that species. 

 Kuckuck, however, did not suggest its removal from the 

 Tilopteridacese, hence a fourth genus, Heterospora^ would 

 have to be added to that family, at any rate pro tern. 



The type species, Tilopteris Mertensii Klitz., was first 

 found on the beach at Yarmouth in 1799 and named Con- 

 ferva Mertensii by Turner.^ It was subsequently rechris- 

 tened Ectocarpus Mertensii by C. Agardh,"* because it very 



^ P. Kuckuck, Ueber Schwarmsporenbildung bei den Tilopterideen 

 und tiber Choristocarpus tenellus (Kiitz.) Zan. (Jahrbliclier ftir wis- 

 senscli. Botanik, vol. xxviii., No. 2). 



2 For fig. see English Botany, PI. 999. 



2 C. A. Agardh, Species algarum, ii., p. 47. 



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