Point. 
Strie 19 in 0'01 millim. 
S. affinis, var. tabulata, Kütz. 
0:005 millim. 
in 0:01 millim. 
S. commutata, Qrun, var. septentrionalis, Grun. 
Strize 12 in 0:01 millim. 
Length 0:27 millim.; breadth 0:0009 millim. 
Bessel's Bay. 
S. affinis, var. 
F. islandica, Grun., var. 
Bessel’s Bay. 
316 ON DIATOMS COLLECTED DURING SIR Œ. NARES’S EXPEDITION. 
Mushroom 
Length 0:115 millim.; breadth 
Striæ 94 in 0°01 millim. Bessel’s Bay. 
Fragilaria oceanica, Cl. (=F. arctica, Grun.). 
Bessel’s Bay. 
With larger area, and with 12 stris 
Liemophora Jurgensii, Ag. Bessel’s Bay. 
Grammatophora islandica, Ehreb. Strie 14 in 0°01 millim. 
Bessel's Bay. 
G. arctica, Cl. Bessel’s Bay. 
Striatella delicatula, Kütz. 
Bessel’s Bay. 
Jhabdonema arcuatum (Ag.). 
R. Torellii, Cl. 
Nitzschia marginulata, 
Grun. Mushroom Point. 
N. glacialis, Grun. Disco- 
very Bay. 
N. levissima, Grun. Dis- 
covery Bay. 
N. vitrea, var. Discovery 
Bay. 
Biddulphia aurita (Lyngb.). 
Bessel’s Bay ; Mushroom 
Point. 
Triceratium arcticum, Btw., 
and forma Zygoceros Ba- 
In all 59 species. 
lena, Ehrenb. Bessel’s 
Bay. 
Hyalodiscus scoticus 
(Kiitz.), Grun.  Bessel's 
Bay ; Mushroom Point. 
Podosira hormoides, Mont. 
Mushroom Point. 
Melosira Borreri, Grev.,var. 
Bessel’s Bay. 
M. mediterranea, Grun., 
var.? Mushroom Point. 
M. nummuloides, var. hyper- 
borea, Grun. Discovery 
Bay. 
Thalassiosira .Nordenskiüldii 
Cl. Cape Sabine. 
Coscinodiscus subglobosus, 
Grun. CapeSabine. 
Many among them have not been indicated 
in the list of Dr. Dickie, which contains on the other side several 
species not observed by me. These are :— 
Achnanthes longipes. I have not found this species in the Arctic 
Sea, so the determination may perhaps be doubtful. Dr. Dickie 
has not indicated any locality for this species. 
Amphiprora longa, Cl. | 
A. nitzschioides, Cl.— | 
Nitzschia Amp iprora, 
Grun. 
Amphora affinis (no author 
and no locality). 
A. Eunotia, Cl. 
A. lanceolata, Cl. 
