270 IP t e I s i a 



of growth is very peculiar. It is a perennial 

 and has a constriction in the lamina marking 

 the end of each year's growth, while I know of 

 no reason for supposing that Rcujrewia par- 

 viila is a perennial. Though this habit of 

 growth may on closer study be considered of 

 generic importance, it seems best for the present 

 to consider this plant as Renjrewia solidiingula 

 (J. G. Agardh). 



La miliaria yezzanisis ]\Iiyabe (Rep. Marine 

 Resources Hokkaido 3. On the Laminariaceae 

 and Laminaria Industries of Hokkaido, p. 41 

 t. 12-13.) is a large plant (1.25 millimeters) 

 with an almost orbicular lamina digitately 

 divided. It appears to be congeneric with my 

 plant and should therefore be considered under 

 the name Renjrewia yezzcensis (Miyabe). 



The type specimen is deposited at the 

 University of ^Minnesota, with cotypes in the 

 collection of the author and the herbarium of 

 the Ohio State University. Specimens will be 

 distributed bv Miss Tilden in her "American 

 Algce." 



As a summary a synopsis of the species of 



