PROCEEDINGS OF SOCIETIES. 119 



S. Oxyrynchus, Klitz. — Bidston marsh, October, 1857- 



S. obtusa, Sm.— Thornback pool, Sept., 1856; Moreton well, 



Mav, 1857. 

 S. capitate, Ehr.— Hoylake, October, 1856, G. M. B.— 



Bidston marsh, October, 1857. 

 8. tabulata, Kutz. — R. Fender, June, 1856; Dee Marsh, near 



Queen's ferry, June, 1858. 

 S. affitiis, Kutz. — Bidston marsh, October, 1857. 

 S. Arcus, Kutz. — Dingle bay, February, 1857 ; Rock ferry 



slip, February, 1857, L. H. 



Cocconema, Ehrenberg. 

 C. lanceolatum, Ehr. — Frequently. Well in Brombro' woods, 



May, 1857, &c. 

 C. cymbiforme, Ehr. — Frequent. Rock in Dingle, March, 1 857- 



C. Cistula, Ehr.— Canal bridge, over R. Alt, June, 1857. 

 C.parvum, Sm. — Rock in Dingle, March, 1857. 



Dobyphora, Kiitzing. 



D. Amp/iiceros, Kiitz. — Sparingly in many localities subject 



to marine influence. New Brighton sands, Sept. 1858. 

 Gomphonema, Agardh. 

 G. geminatum, Ag. — Patrick's well, March, 1856, L. H. 

 G.constrictum, Ehr. — Frequent. Rock ferry, March, 1857, &c. 

 G. acuminatum, Ehr. — Frequent. Well at Moreton, May, 



1857, &c. 

 G. cristalum, Ralfs. — Canal bridge over R. Alt, June, 1857. 

 G. dichotonmm, Kiitz. — Well at Moreton, May, 1857- 

 G. tenellum, Sm. — Frequent. Rock ferry, March, 1857, &c. 

 G. capitalum, Ehr. — far. y. Well at Moreton, May, 1857- 

 G. olivaceum, Ehr. — Rock ferry, March, 18 57. 

 G. mtricatum , Kiitz. — Rock in Dingle, March, 1857. 

 G. curvalum, Kiitz. — Frequent. Sefton lock, July, 1857, &c. 



Rhipidophora, Kutzing. 

 R. Dalmatica, Kiitz. — Dingle bay, February, 1857- 



Meridion, Agardh. 

 31. circulate, kg. — Notunfrequent,butal\vaysmuch mixed with 



otherdiatoms. Near Wallasey pool, Seacombe, April, 1856. 

 Bacillaria, Gmel. 

 B. paradoxa, Gmel. In most brackish localities. Bidston, 



Eastham, Ditton, and Dee marshes. 

 B. cursoria, Donkin.* — Sands at New Brighton, Sept. 1858. 



* In my specimens the F.V. is always presented to the eye when in the 

 living state. I consequently name it with a little doubt; it is certainly not 

 B. paradoxa. 



