No. XIV. 



BOTANY. 



325 



It thus appears that certain well-known European genera 



have their representatives in the cold marshes of lands beyond 

 80° N. 



The Diatomacece are also, on the whole, well represented 

 in the collections made by Captain Feilden, Dr. Moss, and 

 Mr. Hart. 



I have observed the following genera, and it may be 

 sufficient to record here merely the number of species of each 

 genus, a complete list of names being preserved for full 

 report elsewhere. 



List of Diatoms, beyond Lat. 78° N. 



Making in all thirty-one genera and seventy species so far as 

 I have observed ; most of them are marine, those of fresh- 

 water being fewer. 



P. T. Cleve, in a communication to the Swedish Academy 

 of Sciences, March 12, 1873, states that the whole number 

 found in the Arctic Sea is 181 ; but he considers seventeen 

 of these as of doubtful occurrence in that region. In the 

 same paper he specifies those found at Spitsbergen, which 

 seems, as in the case of the higher algae already alluded to, 

 to be richer in species than the parts of the Arctic Sea visited 

 by the late Expedition. 



