330 GUERNSEY. 
Amphora ovalis, Kutz. 
Rather common in fresh-water gatherings. 
Amphora incurva, Greg. 
Abundant at Cobo and at Bordeaux. 
Amphora Grevilleana, Greg. 
In the same localities as the last species, but less common. 
Amphora robusta, Greg. 
Amphora hyalina, Kutz. 
Brackish pool at Pulias, frequent. 
Amphora affinis, Kutz. 
With the last, but less common. 
Amphora marina, Sm. 
Frequent in shore gatherings all round the coast. 
Amphora crassa, Greg. 
Petit Bot Bay, a few good characteristic specimens. 
Amphora spectabilis, Greg. 
Amphora biseriata, Greg. 
Moulin Huet, at low-water mark : often unsymmetrical. 
Amphora fascinata, Ehr. 
Amphora sarniensis, Greg. 
ACHNANTHEAE. 
Cocconeis Pediculus, Ehr. 
Pool near Fort Doyle, frequent in one of my gatherings. 
Cocconeis Placentula, Ehr. 
Saints Bay Valley, rare. Rivulet near Lilyvale, rare. 
Cocconeis diaphana, Sm. 
Rather common: mostly the var. 3. of Smith. 
Cocconeis dirupta, Greg. 
Rather common in shore gatherings. 
Cocconeis Scutellum, Ehr. 
Common generally. The var. y. of Roper occurred plentifully 
in rock scrapings from low tide at Perelle Bay. 
Cocconeis Jamprosticta, Greg. 
Petit Bot Bay, one valve. Perelle Bay, a few. 
