Manchester Memoirs, IW. ////. (igog), No. 14. 3 



in the Nile Delta, and also by the fact that the 

 accompanying form of Chara Bratinii* which occurs at 

 Reddish is very near the form of that species which occurs 

 in Northern Africa. 



Shortly after my 'advent to Manchester in 1892, 

 I visited this interesting locality with Mr. Charles Bailey, 

 and we collected specimens of both these plants. I have 

 since visited this locality on various r ccasions, and always 

 found both plants present. 



In December, 1908, being desirous of getting some 

 iresh specimens of these two interesting aliens to show to 

 the Botanical Survey Committee, on the occasion of its 

 visit to Manchester, I was disappointed to find it 

 impossible to obtain any specimens of Naias graDiinea^ 

 and I have been equally unsuccessful on my visit last 

 week. Whether it has been unable to compete with the 

 more luxuriant development of the Canadian pondweed, 

 or whether the undoubtedly greater contamination of the 

 canal with refuse and other suspended matter, has affected 

 its growth or reproduction unfavourably, I cannot say, 

 but it seems to me not unlikely that both factors have 

 contributed to its disappearance, or at all events to a 

 considerable reduction in the number of its plants, for it is 

 still possible that it occurs in some reaches of the quarter 

 of a mile along which it was formerly found. But though 

 the filth on the bottom of the canal seems to have 

 accumulated, and the surface of the water is in parts 

 covered with a greasy film, vegetation is still fairly 

 abundant, and most of the other plants mentioned by 

 Mr. Bailey {Potamogeton crispus, P.pusillits, Myriophyllum, 

 Elodea and Chara Braunii) are present, and in some 

 places, fairly abundant. Zannichellia we have not been 



♦Groves H. and J. "Notes on the British Characeae." /oiinia! of 

 Botany, 1884. 



