116 PROCEEDINGS OF SOCIETIES. 



JV. palpebrals, Breb. — New Brighton sands, September, J 858. 

 N. Semen, Kiitz. — R. Alt, near Sefton, July. 18.57. 

 N. affirm, Ehr. — Wall on Dingle shore, March, 1857; rail- 

 way bridge, Spittal, May, 1857- 

 JV. injiala, Kiitz. — R. Alt, near Sefton, July, 1857. 

 JV. gibberula, Kiitz. — Frequent, but always much mixed with 



other diatoms. 

 N. amphirynchus, Ehr. — R. Alt, near Sefton, July, 1857 — 



Storeton, June, 1856, L. H. 



Var. (5. — Frequent, generally in brackish water. 



N. sphrerophota, Kiitz. — Hoylake, October, 1856, G. M. B. 

 JV. tumens, Sm. — Bidston marsh, July, 1856; October, 1856; 



and October, 1857. 

 JV. punctulata, Sm. — Primrose hill, New ferry, July, 1856; 



Eastham marsh, September, 1858. 

 JV. pusilla, Sm. — Sands at Great Meols, May, 1857; Bidston 



marsh, October, 1856, and October, 1857. 

 JV. tumid a. Sm. — Moss at Rock ferry, October, 1857. 

 JV. dicepliala, Kiitz. — Birkdale marsh, June, 1858, G. M. B. 

 JV. cryplocephala, Kiitz. — Bidston marsh, May, 1857; rock at 



Storeton, March, 1857, &c. 

 JV. lineata, Donk. — New Brighton sands, September, 1858. 

 JV. didyma, Kiitz. — Frequent, Bidston marsh, Oct. 1857, &c. 

 N.binodis,YL\\Y. — Thornback pool, Crosby, September, 1856; 



Hoylake, October, 1856, G. M. B. 

 JV. lavissima, Kiitz. — Thornback pool, Crosby, September, 



1856— Southport, June, 1857, G. M. B. 

 JV. pectinalis, Breb. — Sands at Great Meols, May, 1857, R. 



Fender, Bidston marsh, August, 1858; Dee marsh, near 



Queen's ferry, June, 1 858. 

 JV. return, Breb. — New Brighton sands, September, 1858; 



Southport sands, August, 1858, G. M. B. 

 JV. Lyra, Ehr. — Seacombe, April, 1858; Southport sands, 



August, 1858. 

 JV. humerosa, Breb. — Sands at Great Meols, May, 1857; New 



Brighton sands, Sept. 1858; Southport marsh, June, 1857. 

 JV. Trochus, Greg.— Hoylake, October, 1856, G. M. B. 

 JV. lacusire, Greg. — River Alt, Sefton, July, 1857. 



var. /3, with var. a. 



N. quadrangular]*, Greg. — New Brighton sands, April, 1858; 



Leasowe sands, October, 1858; Southport sands, Au- 

 gust, 1858, G. M. B. Generally much elongated, with 



a curved median line. 

 JV. apiculata, Breb. — Southport sands, August, 1858. 



Pinxularia, Ehrenberg. 

 P. major, Sm. — Storeton, June, 1856, L. II. 



