28 BRITISH DIATOMACE^. 



2. Pleubosigma DECORLTtf, i. 63. t. 21. f. 196. B.M. 



a. Ipswich, Mr. Hod(jso7i, Aug. 1851. 



b. Ipswich, Mr. Hodgson, Aug. 1851. 



3. Pleubosigma speciosum, i. 63. t. 20. f. 197. B.M. 



a. Walton, Essex, Mr. Topping, 

 h. Walton, Essex, Mr. Topping. 



c. Salt Pans, Hants, Sept. 1854. 



4. Pleubosigma bigidum, i. 64. t. 20. f. 198. B.M. 



a. Ipswich, Mr. Hodgson, Aug. 1851. 



5. Pleltiosigma elongatum, i. 64. t. 20. f. 199. B.M. 



a. Poole Bay, June 23, 1849. 

 h. Poole, June 1849. 



6. Pleubosigma intebmedium, i. 64. t. 20. f. 200. B.M. 



a. Seaford, March 15, 1852. 



b. Neiohacen, Sussex, March 1852. 



7. Pleubosigma Nubecula, i. 64. t. 20. f. 201. B.M. 



a. Seaford, April 19, 1852. 



b. Sussex, 3Iarch 1852. 



8. Pleu-bosigma delicatulum, i. 64. t 20. f. 202. B.M. 



a. Brooks near Lewes, Sept. 1850. 



b. Lewes, Oct. 1850. 



9. Pleubosigma stbigosum, i. 64 t. 21. f. 203. B.M. 



a. Lancing, Sussex, Nov. 19, 1852i 



b. Sussex, Aug. 1850. 



c. Lancing, Sussex, Aug. 1852. 



d. Seaford, Sussex, March 1852. 



10. Pleubosigma quadbatum, i. 66. t. 20. f. 204. B.M. 



n. Poole Bay, June 11, 1849. 

 b. Sussex, Aug. 1850. 



