40 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



the ten thousand on May 4th to over fifty-four millions 

 on May 16th, is most rapid. The most abundant species 

 were Chaetoceras debile and Ch. sociale. On May 16th 



j-V-, *? 





> WSfT 'V. 

 . * 



v. 

 .. . . 



Fig. 16. Birfdulphia mobiliensis (a) and B. sinensis (b). 

 the first of these species reached thirty millions and the 

 second 12 millions in the standard fifteen minutes' haul 

 with a small net one foot in diameter of mouth. 



Extended Investigation up the West Coast. 



In last year's report I pointed out that our 

 knowledge of the minute floating life or " plankton " of 

 the western coasts of the British Islands was very 

 incomplete because of a great gap extending from the 

 North of Scotland down to the Irish Sea — a gap which 

 neither the International Observations, on the one hand, 

 nor those of the Scottish and the Irish Authorities, on 

 the other, seem to fill up. 



With a view to obtaining some data that may, in 

 part at least, bridge this gap, and possibly throw light 



