76 BRITISH DIATOMACE^. 



Aberdeenshire, frequent. Dr. Dickie. Lough Moume and Peterhead De- 

 posits. Premnay Peat. Dolgelly Earth. Marl, Co, Down. Cantyre Peat. 

 Lough Islaud-Reavey Deposit. (Little Falls, N. Y., Oregon, and Nova Scotia; 

 New Zealand.) /3. Lough Neagh, Dr. Dickie. 



Plate XXIIL 219. Frustules with endochrome, Frontispiece, fig. CCXIX. 



2. Cocconema cymbiforme, Ehr. F.V. linear-oblong; V. narrow, 

 concave margin scarcely inflated; striae moniliform, 21 in '001". 

 Length -0016" to -0032". v.v. 



Ehr. Inf. xk. 8. Kiitz. Bacill. vi. 12. Hass. Alg. ci. 2. 



Fresh water : not so frequent as the last, and scarcely distinct from it. 

 Near Wareham, Apr. 1848; Lewes, May 1851, W. Sin. Near Bristol, 

 Mr. Thwaites. Wray, Lancashire, Mr. G. Smith. Lough Mourne and 

 Peterhead Deposits. Marl, Co. Down. Cantyre Peat. 



Plate XXIIL 220. 



3. Cocconema Cistula, Ehr. F. V. nearly linear, obtuse ; V. much 

 bent, distinctly inflated on the concave margin, obtuse ; strise moni- 

 liform, 24 in -001". Length -0008" to -0034". v.v. 



Ehr. Inf. xix. 7 ? Kiitz. Bacill. vi. 1. Hass. Alg. ci. 3. In Conjugation, Thw. 

 Ann. vol. XX. pi. xxii. E. Cymbella reniformis, Ag. Consp. p. 10. ad 

 specim. authen. quae misit cl. Dr. Greville. 



Freshwater: frequent. Near Lewes, Mar. 1850. In Conj. Plumpton, 

 Sussex, Apr. 1852, &c., W. Sm. Aberdeenshire, Dr. Dickie. Lough Mourne 

 Deposit. Dolgelly Earth, &c. &c. 



Plates XXIIL 221. XXIV. 221. Frustules with endochrome, Frontis- 

 piece, fig. CCXXI. 



4. Cocconema parvum, n. sp. F. nearly direct ; F. V. oblong ; 

 V. scarcely inflated on concave margin; striae moniliform, 21 in 

 •001". Length -0009" to -0016". v.v. 



Fresh water. Surface of Chalk cliff, Beachy Head, Aug. 1850. In Conj. 

 Apr. 1851, W. Sm. 



Plates XXIIL 222. XXIV. 222. 



