28 



P. T. CLEVE, OX DIATOMS FROM THE ARCTIC SEA. 



The Rev. E. 0'Meara of Dublin has published in the Jour- 

 nal of the Roy. Dubl. Soc. July 1860 a list of diatoms, found in 

 gatherings made by Sir Leopold M'Clintock. The list, 

 of which I Avas not cognizant before this paper was written, 

 contains 85, species, of which I have not noticed the follow- 

 ing in the samples from the arctic sea, examined by me. 



Achnanthes longipes. 

 Amphiprora alata. 



» constricta. 



Amphora hyalina. 

 )i robusta. 



» proboscidea. 

 » tenera. 

 Bacillaria paradoxa. 

 Cocconeis splendida. 

 iiitida. 

 ornata. 

 ovalis. 



pseudomarginata. 

 Coscinodiscus punctulatus. 



» minor. 



Doryophora Boeckii. 

 Eupodiscus crassus. 

 Grammatophora marina. 



» serpentina. 



Navicula inconspicua. 



» clutensis. 



» minor. 



» interrupta. 



» cyprina. 



» latestriata. 



» Johns ohii. 

 Nitzschia hyalina. 



» lanceolata. 



» parvula. 

 Pleurosigma lanceolatum. 

 » prolongatum. 



» , strigosum. 

 Podosira hormoides. 

 Rhizosolenia Calcar avis. 

 Schizonema cruciger. 

 Stauroneis crucicula. 

 Synedra gracilis. 



Including those 37 species the whole number found in 

 the arctic sea is 181, among which are 17 in my 'enumera- 

 tion, which I do not regard as of certain occurrence in that 

 region. 



