158 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
oceanic origin, a point we shall return to below. 
Further South again, in the Firth of Lorn and the Lynn 
of Morven, off Bernera Island, and between Kerrera and 
Mull, from depths of 80 to 116 fathoms, the gatherings, 
of which we have half-a-dozen for comparison, are 
composed of a grey or brownish fine material, which is 


Sample, composed mainly 
showing Acartia and Temora. of Thalassiosira nordenskwoldw. 

Fia. 10.—A Copepod zoo-plankton gathering fF ia. 11. 
[From photo-micrographs by Mr. Edwin Thompson. } 
a mixed plankton (such as fig. 9 shows) neither 
characteristically phyto-planktonic nor zoo-planktonic, 
consisting, as it does, of small Copepoda, many Nauplii 
and Tintinnide, some Sagitta and Orkopleura, with a 
few Ceratium, more Peridiniwm and many Diatoms— 
the latter being mainly species of Chaetoceras (such as 
