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Islands, distributed from " Herbarium of the U.S. Pacific Exploring 

 Expedition under Commanders Ringgold and Rodgers, 1 853-56." 

 In Harvey's List of Plants collected by C. Wright we do not 

 find Cladophora composila Harv., but we know a plant with the 

 same nomenclature established by Hooker and Harvey, which is 

 known from Island Mascaren and Honolulu harbour (De Toni 

 Syll. Alg. I, p. 347). This specimen kept in the Herbarium is 

 proved, under microscopical examination, to be nothing else but 

 Boodlea coacta and not Cladophora composita H. et H. 



Plate XV. Fig. 1 : plant in nat. state and size. — Fig. 2 : 

 portion of frond showing anastomosing of cells, や. 一 Fig. 3-4 : 

 some of filaments detached to show the mode of branching : 

 fig. 3, や ； fig. 4, や. 一 Fig. 5, 6 and 7 : tenaculae formed on 

 apices or sides of cylindrical cells, -. L 5 . 



