DIATOMACEAE. 341 
Stauroneis australis, Grev. (?). 
One fine specimen in a gathering from low water at Cobo. A 
large species, agreeing well with Greville’s figure and description of the 
Queensland form, except that the stauros is longer and broader. 
Dry valve nearly colourless. 
Amphiprora vitrea, Sm. 
Amphiprora elegans, Sm. 
Amphiprora lepidoptera, Greg. 
Rather common in some of the Cobo gatherings. A few at 
Bordeaux and at Petit Bot Bay. 
Amphiprora maxima, Greg. 
Amphiprora complexa, Greg. 
Amphiprora alata, Kutz. 
Abundant in a small roadside marsh at Bordeaux, now filled up 
Sparingly at Petit Bot Bay and Perelle. 
Diadesmis Williamsoni, Greg. 
Mastogloia Smithii, Thw. 
Common in some of the gatherings from Grande Mare. 
Mastogloia Dansei, Thw. 
Plentiful among gelatinous drippings on rocks at Petit Port. 
Mastogloia apiculata, Sm. 
Sparingly in a gathering from Cobo. 
Berkeleya fragilis, Grev. 
Colletonema vulgare, Sm. 
Schizonema crucigerum, Sm. 
Schizonema Grevillei, Ag. 
GOMPHONEMEAE. 
Gomphonema tenellum, Kutz. 
Gomphonema dichotomum, Kutz. 
Frequent in the marsh at the eastern side of Lancresse. 
Gomphonema Vibrio, Ehr. 
