﻿234 Proceedings of the Boyal Physical Society. 



Tahdation of Results. — The lists of species were entered 

 on separate sheets, each bearing the number of the Haul, 

 the Zone, and the Position. 



nr. List of Species Obtained. 



We give here the complete list of the species, compiled 

 from our separate sheets. 



To facilitate the drawing of conclusions from our records, 

 we constructed Tables which showed at a glance the 

 distribution of the various species in Zones, Positions, fresh- 

 water areas, and areas without fresh water. We give here, 

 p. 247, a sample of these Tables, in order to show the method 

 of their construction. Several of the Positions have been 

 omitted in order to save space. 



List of Species Classified according to Zones 



AND Positions. 



DRIFT, UPPER. 



A. Without fresh water. 



Orchestia gammarellus (Pall.). 

 Porcellio scaber, Latr. 

 Isotoma maritima, Tullb. 

 Xenylla humicola (O. Fabr.). Abundant. 

 Cercyon depressus, Steph. 



littoralis, Gyll. Abundant. 

 Homalium laeviusculum, Gyll. 

 Two spp. of Dipteron puparia. 



(■ Collembola. 



Coleoptera. 



DRIFT, LOWER. 

 A. Without fresh water. 



Various Nematodes. 



Various Enchytrseids. 



Orchestia gammarellus (Pall.). 



Molgus (Bdella) littoralis (L.). Very abundant. 



Cercyon littoralis, Gyll. 



Homalium riparium, Thorns. 



Limosina zosterce, Hal. Abundant. (Dipteron). 



