118 PROCEEDINGS OF SOCIETIES. 



P. elongatum, Sm. — Bidston marsh, July, 1856, and October, 



1857; Southport sands, August, 1858. 

 P. intermedium, Sm. — Bootle, December, 1858, G. M. B. 

 P. delicatulum, Sm. — Bidston marsh, May, 1856, L. H. 

 P. strigosum, Sm. — New Brighton, April, 1858. 

 P. angulatum, Sm. — Frequent. Bidston marsh, several times; 



Primrose hill, &c. 

 P. JEstuarii, Sm. — Southport sands, August, 1858; New 



Brighton sands, September, 1858. 

 P. obscvrum, Bidston marsh, May, 1856, L. H. 

 P. Ballicum, Sm. — Bidston marsh, October, 1857; Eastham 



marsh, September, 1858. 

 P. Wambeckii, Donk. (P. Ballicum var. (5. Sm.) — Southport 



sands, August, 1858. 

 P. strigilis, Sm. — Bidston marsh, October, 1857. 

 P. acuminatum, Sm — Primrose hill, July, 1856; Bidston 



marsh, October, 1857- 

 P. Fasciola, Sm. — Primrose hill, July, 1856; Bidston marsh, 



October, 1857 ; Eastham marsh, September, 1858, &c. 

 P. macrum, Sm. — Bidston marsh, October, 1857. 

 P. tenuissimum, Sm. — Wallasey pool, near Spital, April, 1858. 

 P. littorale, Sm. — Primrose hill, July, 1856. 

 P. Hippocampus, Sm. — Not uncommon. Bidston marsh ; 



Ditton marsh, &c. 

 P. attenuatum, Sm. — Brook near Shotwick, Cheshire, June, 



1858. 

 P. lacustre, Sm. — Not unfrequent. River Alt, near Sefton, 



July, 1857, &c. 

 P.Speucerii,Sm. — Storeton, June, 1856, L.H.; River Fender, 



June, 1856; Canal bridge over River Alt, June, 1857- 

 P. lanceolatum, Donk. — New Brighton sands, Sept., 1858. 

 P. marinum, Donk. — New Brighton sands, September, 1858. 



Toxonidea, Donkin. 

 T. Gregoriaua, Donk. — Southport sands, Aug. 1858, G. M. 

 B. — Stomach of Noctiluca, Southport, Aug. 1858, T. S. 

 S. insignis, Donk. — Stomach of Noctiluca, Southport, 



August, 1 858, T. S. 



Synedra, Ehrenberg. 

 S. pulchella, Kiitz. — Wallasey pool, April, 1857 ; Southport 



marsh, June, 1857. 

 S.viiiitdisisima, Kiitz. — " Birkenhead, Cheshire. G. Shadbolt," 



Sui. St/nops. 

 S. radians, Sm. — Almost universally present in fresh-water 



gatherings. 

 S Ulna, Ehr. — Common, though not so much so as the last. 



