18 BRITISH DIATOMACE^. 



2. Cymbella cuspidata, Kiltz. F. smaller than the last, extremities 

 prominent, somewhat acuminate ; striae indistinctly moniliform, 

 30 in -001". Length -0012" to '003 i". v.s. 



Kiitz, Bacill. iii. 40. 



Fresh water. Quernmore near Lancaster, April 1852, Mr. Johnson. "Wray 

 near Lancaster, Oct. 1852, 3Ir. G. Smith. Lough Mourne and Peterhead 

 Deposits. Premnay and Cantyre Peats. (Nova Scotia.) 



Plate 11. 22. 



3. Cjrmbella affinis, Kiitz. V. elliptical-lanceolate, extremities 

 slightly produced; stri^ faint, 30 in -001". Length -0009" to 

 •0015". v.v. 



Kiitz. Bacill. vi. 15. ad spec, authen. qu82 dedit amic. De Brebisson. 



Fresh water. Parham, Sussex, Feb. 1844, 3Ir. Jenner. Iford, Sussex, 

 April 1852, W. Sm. Marl, Co. Down, and Dolgelly Earth. 



Supp. Plate XXX. 250. Frustule with endochrome. Frontispiece, fig. CCL. 



4. Cymbella maculata, Kiitz. Larger segment of V. convex, smaller 

 with a slight inflation in the centre, extremities obtuse ; striae 27 in 

 •001". Length •OOOS" to -0015". v.v. 



Kutz. Bacill. vi. 2 ? 



Fresh water. River Frome near Wareham, Dorset, March 1848, W. Sm. 

 Cantyre Peat and Peterhead Deposits. 



Plate II. 23. 



5. Cjnnbella Helvetica, Kiitz. F. V. linear, slightly arched ; V. 

 elongated, segments as in the last, extremities acute ; striae 24 in 

 •001". Length -0016" to -0031". v.v. 



Kutz. Bacill. \i. 13? Prit. Anim. x^di. 24-28. 



Fresh water. River Ouse near Lewes, W. Sm. Peterhead Deposit. Near 

 Aberdeen, Dr. Dickie. 



Plate II. 24. 



6. Cymbella Scotica, n. sp. V. narrow, elongated, smaller segment 

 straight, extremities acute; striae 32 in "001". Length '0012" to 

 •0027". v.s. 



Fresh water. Pass of Killiecrankie, very plentiful, Mr. P. Grant. Dolgelly 

 Earth. 



Plate II. 25. 



