88 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



bidiscalis, W. F. de Y. Kane, attached to the claspers of 

 the male Tope Galeus canis, Beaumaris Bay, June 20th, 

 1901 ; ? Eudactylina acuta, Yan Ben., on the gills of the 

 angel fish Rhina sonatina, off-shore station, June 28th, 

 1901 ; Eudactylina acanthii n.sp., on the gills of the picked 

 dog-fish Acanthius vulgaris, Beaumaris Bay, September 

 26th, 1901." 



Mr. Scott gives the following notes in regard to 

 Plankton work : — 



" The collections of Plankton which have been taken 

 in the Barrow channel throughout the year, starting from 

 November 1st, 1900, show some interesting changes in the 

 pelagic organisms brought in by the flowing tide, and 

 appear to be worth calling attention to. The method 

 employed to collect the Plankton is to attach a tow-net to 

 the mooring buoy in the middle of that part of the Barrow 

 channel known as Piel Harbour, about half a mile from 

 the Laboratory. The net is attached to the buoy about 

 two hours before high water at Barrow, and left for a full 

 hour. The current at that time runs at 3 to 5 knots per 

 hour, and keeps the net at the surface, sufficient rope 

 being given to keep it clear of the buoy. The catch is 

 brought into the Laboratory and examined alive. 



" Diatoms. — Coscinodiscus occurred in every gather- 

 ing except those taken in June, July and August, and 

 reached its maximum in numbers in March, April and 

 May. Biddulphia has a similar record, but was absent in 

 December, 1900, and the greatest abundance was reached 

 during February, March, April and May. Chcetoceros was 

 very abundant in November and December, 1900 ; after 

 that it disappeared and did not occur again till September, 

 1901. Rhinosolenia only occurred in May, but it was then 

 abundant. 



" Alg^e. — A species of gelatinous Algae made its 



