BRITISH DIATOMACE^. 17 



§ VI. Ceratoneis. 



20. NiTZSCHIA BtROSTRATA, i. 42. t. 14. f. 119. B.M. 



a. Walton, 1852. 



21. NiTzscmA Closteriuji, i. 42. t. 15. f, 120. B.M. 



a. Hove, Sussex. 



6. Wareham, Dorset, Dec. 1849. 



c. Sea, Dorset, Sept. 185.3. 



d. Sussex, May 1851. 



22. NiTzscHiA REVERSA, i. 43. t. 15. f. 121. B.M. 

 a. Letces, Sept. 1852. 



23. NiTZSCHIA ACicuLARis, i. 43. t. 15. f. 122. B.M. 



a. Letces, May 1852. 

 h. Lewes, May 1853. 



24. NiTZSCHIA T^NiA, i. 4:3. t. 15. f. 123. B.M. 



a. Lewes, 1852. 



h. Itford, Sussex, Nov. 1853. 



c. Lewes, Se^it. 1851. 



25. "NiTZSCHIA Gregorh." . B.M. 



a. Cork Hai'bour, July 1855. 



17. AMPIUPRORA, Smith, i. 43. 



1. Amphiprora ALATA, i.44.t.l5.f.l24;Front.i.f.cxxiv. B.M. 



a. Coast of Sussex. 



h. Poole Bay, June 1849. 



c. Sussex, April 1850. 



d. Lyminyton, Hants, Sept. 1854. 



2. Amphiprora palvdosa, i. 44. Supp. t. 31. f. 269. B.M. 



a, Letces, Sept. 1852. 



b. City Park, Cork, April 1855. 



3. Amphiprora didyma, i. 44. t. 15. f. 125. B.M. 



a, Lytham, Lancashire, Sept. 1849. 



