BRITISH DIATOMACE^. 33 



Klitz. Bacill. xxviii. 19. W. Sm. Ann. 2nd Ser. vol. vii. pi. iii. 3. 



Marine. Poole Bay, Sept. 1848 ; Pevensey Bay, Oct. 18.50, TT. S»t. 

 (Peruvian Guano.) 



Plate IX. 6G. 



11. Surirella Craticula, ^/<r. V. lanceolate; alae distinct ; cana- 

 liculi few, small, divergent, reaching the median line. v.s. 



Kiitz. Bacill. xxviii. 22. W. Sm. Ann. 2nd Ser. vol. vii. pi. iii. 4. Prit. Anim. 

 XV. 19-20. 



Fresh water. Bramley Spring near Guildford, Mr. Capron. River Bann, 

 Mr. Cocken. Lough Mourne Deposit. 



Plate IX. ij7. 



12. Surirella ovalis, Breb. V. ovate, acuminate, striated ; striae 

 36 in -001"; alae inconspicuous; canaliculi marginal, numerous, 

 12 in -001". Length -0021" to -0038". v.v. 



Kiitz. Bacill. xxx. 64. W. Sm. Ann. 2nd Ser. vol. vii. pi. iii. 7. 



Fresh water. Near Lewes, Dec. 1852, W. Sm. Near Bristol, Mr. Thwaites. 

 Norfolk, Mr. Brightwell. Pilling, Lancashire, Hev. J. Bannister. 



Plate IX. 68. 



13. Surirella pandtiriformis, n. sp. V. with a subcentral constric- 

 tion ; extremities rounded ; canaliculi inconspicuous. Length 

 •0009" to -0016". v.v. 



Fresh water. Iford near Lewes, Oct. 18.52, W. Sm. 

 Supp. Plate XXX. 258. 



14. Surirella Brightwellii, W. S)n. V. orbicular, with one extremity 

 acute, striated ; striae 32 in °00l" ; alae inconspicuous ; canaliculi 

 distinct, marginal, 10 in -OOl". Length -001 1" to -0016". v.v. 



Surirella Crumena, BreTs. in Kiitz. Sp. Alg. p. 38. sic cl. De Brebisson in lit. 

 cum specim., Sept. 1852. 



Fresh or brackish water. Coast of Norfolk, Mr. Brightwell, 18.'>0. Lewes, 

 Sept. 1851, W\ Sm. 



Plate IX. 69. 



15. Surirella ovata, Kiitz. V. ovate, minute; alae small; canali- 

 culi marginal, 11 in -OOl". Length -0008" to -0018". v.v. 



Kutz. Bacill. vii. 1, 2, 3. 



