100 A CATALOGUE OF THE BRITISH MARINE ALG/E 



Polysiphonia atrorubescens Grev. = P. niyra Batt. 



Dasya coccinea Ag. Heterosiphonia plumosa Batt. 



Griffithsia eorallina Ag. G. corallinoides Batt. 



Grijfithsia setacea Ag. G. flosculosa Batt. 



Calliihamnion hormocarpum Holm. Seirospora hormocarpa Batt. 



Dumontia filiformis Grev. = Z). incrassata Lam. 



Ditdresnaya coccinea Crn. = D. verticillata Le Jol. 



Corallina inediterranea Aresch. = C. elonyata Johnst. 



LIST OF GENERA. 

 OBS. The figures refer to the numbers of the genera in the text, not to the page. 



