914 PROF. P. T. CLEYE ON THE DIATOMS COLLECTED DURING 
Cymbella rupicola, Grun. (A. Schm. Atl. pl. lxxi. figs. 70-71). 
A small variety; length 0:027 millim., breadth 0'0055 millim. 
Dorsal stri: 12, and ventral 16 in 0°01 millim. 
C. Botellus, Lagerstedt. Achnanthes marginata, Grun. 
Achnanthidium flexellum, Gomphonema angustatum, 
Bréb. Kiitz. 
Navicula viridula, Kütz. Length 0:05 millim; breadth 0°01 
millim. Stris 12 in 0°01 millim. 
N. rhynchocephala, Kütz. | N. eryptocephala, Kitz. 
N. falaisiensis, Grun. ? Length 0:033 millim ; breadth 0:006 
millim. Striz 16 in 0°01 millim. 
N. perpusilla, Grun. 
Ceratoneis arcus, Kütz. Very common. Probably Hunotia 
arcus in the list of Dickie. 
Synedra Vaucherie, Kütz., var. capitellata, Qrun. Strie 18 in 
0°01 millim. 
S. pulchella, var. saxonica, Kütz. ? Length 0:05 millim.; breadth 
0:006 millim. Striz 20 in 0°01 millim. 
Diatoma tenue, var. elongata, Lyngb. Very common. 
Denticula tenuis, var. frigida, Kütz. 
Surirella ovata, Kütz. | Cyclotella antiqua, W. Smith. 
In the gathering from Mushroom Point were occasionally two 
freshwater species :— 
Navicula pusilla, W. Sm. | N. vulpina, Kütz. 
In all 19 different freshwater species were found. 
Dr. Dickie enumerates the following not found by myself :— 
Cymbella maculata, Kütz. Navicula firma, Kütz. 
Eunotia arcus, Sm. NV. globiceps, Greg. 
E. diodon, Ehrenb. N. mesolepta, Ehrenb. 
Meridion circulare, Ag. N. minutula, 8m. 
Navicula ambigua, Ehrenb. Stauroneis anceps, Ehrenb. 
N. borealis, Ehrenb. 
Surirella constricta (without the name of the author, S. con- 
stricta, W. Sm.,2 S. Smithii, Ralfs). 
With this addition the freshwater species attain the number 
of 31. 
The marine species found by me are the following :— 
Amphora cymbifera, Greg. Mushroom Point. 
A. lineata, Greg. Bessel’s Bay. 
A. proteus, Greg. Mushroom Point, Bessel’s Bay. 
Gomphonema kamtschaticum, Grun., forma minor. Mushroom 
