52 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



shingle between the weed-covered rocks in the Laminaria 

 zone, among the small red and green seaweeds growing 

 in both salt and brackish water rock-pools and attached 

 to boulders just exposed at low tide, on the brown sea- 

 weeds (especially among the haptera), and with the 

 animals picked from the walls of the caves and from the 

 sides of the breakwater. 



" The genera found were Oncholaimus , Enoplus, 

 Spilophora, Rhabditis, Plectus, Dorylaimus, and a few 

 others, which, owing to the meagreness of the literature 

 on the free-living marine forms, I was unable to 

 determine with certainty. Some of these genera are 

 peculiar to salt water. The rest are found also in fresh 

 water and on land. 



" The majority of species, especially those more 

 distinctively marine, were seen to be provided with 

 adhesion glands at the tip of the tail. By means of 

 these they are enabled to attach themselves to some 

 suitable support and, probably, to maintain their 

 position, resisting the force of the waves, which would 

 otherwise send them adrift. 



" Species possessed of eye-spots were not uncommon, 

 though by no means so numerous as those not so 

 provided. Both kinds, however, were constantly found 

 in company. 



" Nematodes were especially abundant in situations 

 rich in organic debris. They were also numerous in 

 certain localities where Diatoms were plentiful, as among 

 the small red and green seaweeds growing in the rock- 

 pools and attached to boulders just exposed at low tide. 

 A number of individuals of the genus Oncholaimus were 

 found to contain the frustules of Diatoms, all of the 

 same genus Fragilaria, both in the oesophagus, down 

 which they were passing, and in the intestine, where 



