470 ]>K MURRAY ON THE DEEP AND SHALLOW-WATER MARINE FAUNA 



Tin.' form, which Count Castracane has indicated as " Fragilaria ? an Terebraria? sp.," 1 may be regarded as 

 the southern representative of Fragilcwria oceanica, Cleve, from the Arctic Ocean, with which it shows in the 

 general arrangement and character of the frustules a considerable amount of agreement. Among the Diatoms 

 observed at this Station, the following have been also recorded in the Arctic zone, a few of the species being almost 



cosmopolitan :— 



Kavicula aspera, Ehrenberg. 

 TriceraUv/m a/rcticum, Brightwell. 

 RMzosolmia setigera, Brightwell. 



„ styliformis, Brightwell. 



Chcetoceros decipiens, Cleve. 



„ atlanticim, Cleve. 

 Goscinodiscus decrescens, var. polaris, Grunow 

 „ „ var. repleta, Grunow 



Ooscinodiscus subtilis, Ehrenberg, var. glacialis, 

 Grunow. 



„ oculus-iridis, Ehrenberg. 



,, centralis, Ehrenberg. 



,, iwrmanni, Gregory. 



„ kutzingii, A. Schmidt. 



,, excentricus, Ehrenberg, 



„ lineatus, Ehrenberg. 



J Bot. Cliall. Exp., part iv. j. 47, pi. XXV. fig. 1. 



Serolis bromleyana, WiUemoes-Suhm. A southern deep-sea form. 



