Algve of the English Lake District. By Wm. West. 745 
Genus Encyonema Kiitz. 
E. csespitosum Kiitz. B. 
E. gracile Babh. W. 
Genus Amphora Elirnb. 
A. ovalis Kiitz. Bn., W., H., B., H. (at 2400 ft.), Deepdaie, 
Crummock Water. 
Genus Cocconeis Ehrnb. 
C. Placentula Ehrnb. H., Bn., Derwent Water, near Cocker- 
mouth. 
G. Thwaitesii Sm. B. 
Genus Achnanthidium Kiitz. 
A. microcephalum Kiitz. Scawfell, Stye Head Tarn. 
A. lanceolatum Breb. B., Threlkeld, Derwent Water, near 
Cockermouth. 
Genus Achnanthes Bory. 
A. exilis Kiitz. Very common. 
Genus Denticula Kiitz. 
D. tenuis Kiitz. B. 
D. obtusa Sm. B. 
D. sinuata Sm. L. 
Genus Odontidium Kiitz. 
0. hiemale (Lyngb.) Kiitz. B., H. (at 2400 ft.), Derwent 
Water, Crummock Water, Ennerdale, Kirk Fell. 
0. mesodon Kiitz. Common. Occurs up to 2400 ft. on Helvellyn. 
O. mutabile Sm. Frequent. 
O. Harrisonii Sm. Bn. 
Genus Fragilaria (Lyngb.) Ag. 
F. capucina Desmaz. Bo., H., Threlkeld, Grisedale Tarn, 
Derwent Water, Yale of Newlands. 
F. virescens Balfs. B., Deepdaie, Crummock Water. 
Genus Diatoma D. C. 
D. vulgare Bory. B. 
D. elongatum Ag. B., Grisedale Tarn. 
Genus Synedra Ehrnb. 
S. lunar is Ehrnb. Common. 
S. sp. B. 
This was near to S. longissima Sm., but was straighter and 
narrower. 
1892. 3 e 
