BRITISH DIATOMACE^. 83 



Kiitz. Bacill. ix. 13. Prit. Anini. xvi. 14. Podosphenia cuneata, Ehr. Inf. 

 xvii. 8. 



Marine. Shoreham Harbour, Aug. 1850, /F. (Sm. Torhay, Mrs. Griffiths. 



Plate XXIV. 225. 



2. Podosphenia ovata, n. sp. F. V. rounded at the upper extre- 

 mity ; V. rounded at upper, and acute at lower extremity ; striae 

 moniliform, 24 in '001". Length -0033" to -0042". v.v. 



Marine. Shoreham Harbour, Aug. 1850, TT. Sm. 

 Plate XXIV. 226. 



3. Podosphenia Lyngbyei, Kiitz. F. V. truncate at upper extre- 

 mity ; V. rounded at upper, and acute at lower extremity ; striae 

 delicate, 46 in -001". Length -0011" to '0033". v.v. 



Kiitz. Bacill. x. 1, 2. Prit. Anim. xvi. 13. Podosphenia abbreviata, Ehr. 

 Inf. xvii. 7. 



Marine. Coast of Sussex, frequent ; June and Aug. 1850, W. Sm. 



Plate XXIV. 227. 



4. Podosphenia Jurgensii, Kiitz. F. V. truncate at upper extre- 

 mity ; V. rounded at upper, and acute at lower extremity ; striae 

 very faint, 48 in -001". Length -0025" to -0031". v.s. 



Kiitz. Bacill. ix. 12. Styllaria cuneata, Ag. in Grev. B. F. p. 408. ad specim. 

 autben. quae communicavit cl. Dr. Greville. 



Marine. Torbay, Mr. Ralfs. 



Plate XXV. 228. 



5. Podosphenia gracilis, Ehr. F. V. almost linear, truncate; V. 

 scarcely siliceous ; striae obscure. Length "001 1" to '0021". v.v. 



Ehr. Inf. xvii. 6. Kiitz. Bacill. ix. 10. 

 Marine. Jersey, Aug. 1852, Tf^. Sm. 

 Plate XXIV. 228. 



G 2 



