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( ii . ) E CTOC ARP ALES . 
Elachisteaceae. 
Myrionemataceae. 
Ralfsiaceae. 
Leathesiaceae, e.g., Leathesia. 
Asperococcaceae, e.g., Asperoaoccus .. 
Punctariaceae. 
Scytosiphonaceae, e.g., Scytosiphon, Colpomenia. 
Ectocarpaceae, e.g., Ectocarpus , Pylaiella 
Striariaceae. 
Aegiraceae. 
Chnoosporaceae. 
Heterochordariaceae. 
(iii.) CUTLERIALES. 
Cutleriaceae. 
(iv.) Sporochnales. 
Sporochnaceae, e.g., Sporochnus, Carpomitra. 
(v.) Desmarestiales. 
Desmarestiaceae. 
Myriogloiaceae. 
(vi.) Chordariales. 
Chordariaceae. 
Coilodesmaceae. 
Scytothamnaceae. 
(vii.) Laminariales. 
Chordaceae. 
Laminariaceae. 
Lessoniaceae, e.g., Macrocystis. 
Alariaceae, e.g., Ecklonia. 
(B) APLANOSPOREAE. — Reproduction both sexually and asexually, 
but with non-motile aplanospores present ; reproductive organs on 
the surface of the thallus. 
(i.) Tilopteridales. 
Tilopteridaceae. 
(ii.) Dictyotales. 
Dictyotaceae, e.g., Dictyota, Zonaria, Padina , etc. 
(C) CYCLOSPOREAE. — Reproduction sexual only with reproductive 
organs located within the thallus in conceptacles with paraphyses. 
Fucales. 
Sargassaceae, e.g., Sargassum, Cystophora , Scaberia , 
Scytothalia. 
Fucaceae, e.g., Hormosira, Notheia, Myriodesma. 
