34 BRITISH DIATOMACE^. 



Fresh or brackish water. Lewes, March 1851, TF. Stn. Northfleet, Kent, 

 Mr. Shadbolt, Feb. 1852. 



Plate IX. 70. 



16. Surirella salina, W. Sm. V. ovate-elliptical; alae obsolete; 

 caualiculi minute, marginal, numerous, 14 in '001". Length '0005" 

 to -0018". v.v. 



W. Sm. Ann. 2nd Ser. vol. vii. pi. iii. 6. 



Marine or brackish water. Poole Bay, Sept. 1847; Hastings, Aug. 1851, 

 W. Sm. Timber Pond, W. I. Docks, Feb. 1852, Mr. Shadbolt. 



Plate IX. 71. 



17. Surirella pinnata, n. sp. V. linear-ovate ; alae obsolete ; cana- 

 lieuli large, subdistant, marginal, 15 in 'OOl". Length "0006" to 

 •0013". v.v. 



Fresh water. Near Lewes, Jan. and Dec. 1852, JV. Sm. 

 Plate IX. 72. 



18. Surirella angusta, Kilt^. F. V. linear truncate; V. linear, acu- 

 minate; alae obsolete; canaliculi 18 in '001". Length -OOOS" to 

 •0014". v.v. 



KUtz. Bacill. xxx. 52. ad specim. quae misit amic. De Brebisson, Jan. 1853. 

 Fresh water. Lewes, Dec. 1852, W. Sm. 

 Supp. Plate XXXI. 260. 



19. Surirella subsalsa, n.sp. F.V. oblong, inflated; V. elliptical- 

 ovate, striated; striae 30 in "OOl"; larger extremity rounded, rarely 

 attenuated; alae conspicuous ; canaliculi distinct, 8 in •OOl". Length 

 •0006" to -0016". v.v. 



Fresh or brackish Avater. " Brooks " near Lewes, Oct. 1852 ; Newhaven, 

 Sussex, Dec. 1852, W. Sm. 



Supp. Plate XXXI. 259. 



20. Surirella minuta, De Breb. V. ovate-elliptical; alae incon- 

 spicuous; canaliculi marginal, 14 in "OOl". Length •OOOS" to 

 •0009". v.v. 



De Brebisson in Kiitz. Sp. Alg. p. 38. ad specimina authentica quae commu- 

 nicavit cl. Jenner. W. Sm. Ann. 2nd Ser. vol. vii. pi. iii. 5. 



Fresh water. Corfe Castle, Dec. 1849 ; Lewes, March 1851, W. Sm. 



Plate IX. 73. 



