272 



LIST of the FEESH WATEE A~LGM of the 

 LIVEEPOOL DISTEICT. 



By Wm. Narramore, F.L.S. 



With Plates XVI., XVII. 



[Read April 10th, 1891.] 



During the past six or seven years I have interested 

 myself, more or less as far as limited time and opportunity 

 would permit, in the collection and the examination of 

 the Fresh Water Algae of the District of Liverpool, say 

 for fifteen or twenty miles round. I did not set out with 

 the intention of writing a report, otherwise this list would 

 have been much more extended than it is ; it is simply a 

 preliminary list of the unicellular and filamentous forms 

 of the Fresh Water Algae exclusive of the Desmidiacese 

 and the Diatomacese. The list is fairly representative) 

 and I may hope for it that it will serve as a basis for 

 further work. With a systematic list in hand no doubt 

 many of our local naturalists will feel at liberty to add 

 considerably to this division of the " Flora of Liverpool." 

 Whatever has been done by local workers among this 

 group of Cryptogams, I know of no list available as a 

 guide to systematic work. I shall be only too glad to 

 hear of workers among the Fresh Water Algae and to 

 receive additions to the present list from any sources. 



The district is undoubtedly rich in Fresh Water Algae, 

 either side of the Mersey is well provided with flats and 

 shallows, ponds and ditches, canal and stream, moss and 

 marsh, and bog and sandy hollows; habitats so many and 

 so varied are rich in both genera and species. The nature 



