DIATOMACEAE. 335 
Nitzschia scalaris, Sm. 
Frequent in a reedy marsh between Grande Mare and Vazon. 
Perelle, two broken valves. Cobo peat deposit, not uncommon, but 
mostly broken specimens. In Wallich’s gatherings ‘a single, much- 
hidden valve only occurred.’ 
Nitzschia insignis, Greg. 
Nitzschia virgata, Roper. 
Nitzschia spectabilis, Sm. 
Nitzschia Closterium, Sm. 
Nitzschia birostrata, Sm. (Ceratonezs longissima, Breb.) 
Salerie, one very fine specimen. Two or three at extreme low- 
water mark at Cobo. 
Nitzschia socialis, Greg. 
Bacillaria paradoxa, Gmel. 
Homoeocladia filiformis, Sm., var. /3. 
NAVICULACEAE. 
Navicula cuspidata, Kutz. 
Rivulet near Lilyvale, frequent. Fort Doyle pool, rather scarce. 
Navicula angulosa, Greg. 
Perelle Bay, at extreme low-water mark, three specimens. 
Navicula Lyra, Ehr. 
In nearly all the coast gatherings, but sparingly. Varies much 
in size, and to some extent in shape also. 
Navicula forcipata, Greg. 
Navicula Hennedyi, Greg. 
Cobo rock gatherings, scarce. Salerie, one valve.  Perelle Bay, 
two or three. 
Navicula clavata, Greg. 
Occasional in the Cobo gatherings. ‘Iwo or three specimens at 
Perelle Bay. 
Navicula Smithii, Breb. 
Moulin Huet and Cobo, scarce. 
Navicula fusca, Greg. 
