Marine Plants of Nha Trang — Dawson 447 
Fig. 55. Ceramium fimbriatum: Part of a filament showing the whorled, involucrate tetrasporangia and the 
thick, rounded hairs, X 230. b, c, Ceramium taylorii: b. Part of a fertile filament showing the whorled, involucrate 
tetrasporangia, X 200; c, a sterile node showing the division of the cortical band, X 200. d, Ceramium huysmansii: 
A small part of a tetrasporangial axis with a sterile lateral branch, X 150. ^,/, Ceramium gracillimum var. byssoideum: 
e^ Part of a filament of a coarser form (11378), X 200; /, part of a filament of a slender form (11192a), X 328. 
g-j, Ceramium mazatlanense: g, A sterile lower node of 11102a, X 268; h, upper portion of an antheridial plant, 
X 95; /, an older, lower node of an antheridial plant, X 126;/, part of a tetrasporangial filament of 11082, X 150. 
k, Ceramium clarionense: Profile of an upper part of a tetrasporangial plant showing circinate tips and emergent 
sporangia (after Dawson, 1950), X 55. 
