232 SEAWEEDS 



The Geographical Distribution is well marked. 

 Nitophyllum, Delesseria, and Hydrolapathum, the 

 British genera, are widely represented, the two former 

 in southern warm temperate seas as well as in the 

 north. Claudea elegans occurs in Tasmania, and one 

 small inconspicuous species, C. multifida, in Ceylon. 

 Martensia occurs in South Africa, and Grinnellia is 



FIG. 75. Martensia elegans reduced. 



confined to the Atlantic shores of North America. 

 Delesseria Ainboinensis is a singular freshwater form 

 occurring in running streams at a considerable 

 elevation above sea-level in Amboyna. 



Bonnemaisoniecc. 



This small family includes for the most part forms 

 with long slender main shoots clothed with fine 

 filamentous branches. The procarpia are situated in 



