122 PROCEEDINGS OF SOCIETIES. 



0. orichalcea, Sm. — Bidston marsh, October, 1856; well at 



Sefton, July, 1857; andJune, 1858. 

 Mastogloia, Thwaites. 

 M. lanceolata, Thw. — Southport marsh, June, 1857 ; Birk- 



dale marsh, June, 1857, G. M. B. 

 M. Smithii, Thw. — Birkdale marsh, June, 1857. G. M. B. 



Excyonema, Kiitzing. 

 E. prostration, Ralfs. — Sefton lock, July, 1857; canal bridge, 



over R. Alt, June, 1857. 



Colletonema, Brebisson. 

 C. eximium, Thw. — Bidston marsh, October, 1857- 

 C. vulgare, Thw. — Storeton well, March, 1857. 

 C. neglectum, Thw. — R. Alt, near Sefton, July, 1857 ; R. 



Fender, Bidston marsh, August, 1858. 

 Schizonema, Agardh. 

 S. cruciger, Sm. — Bidston marsh, May, 1^56; New Brighton, 



February, 1857; Canning Graving Dock, August, 1858. 

 S. /ielmi?itosum, Chauv. — Rock ferry slip, February, 1857, 



L. H. — Dingle Bay, February, 1857. 

 S. Smithii, Agardh. — Rock ferry slip, February, 1857 — New 



Brighton, March, 1857, L. H. 

 S. Grevillii, Agardh. — New Brighton, March, 1857, L. H.; 



and October, 1856, G. M. B. 



Homceocladia, Agardh. 

 H. fdiformis, Sm. — Canal bridge over R. Alt, June, 1857 — 



Canal at Aintree, June, 1858, L. H. 

 H. sigmoidea, Sm. — Pit at Aintree, June, 1857; Bidston 



marsh, October, 1857. 



Asterionella, Hassall. 

 A. formosa, Hass. — In Rivington Pike water supplied to the 



town. 



