422 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



in the Bay and open sea from March 13th to April 23rd 

 in 1908. This was the latest date on which plaice eggs 

 were found during the six years. The larvae were well 

 advanced and nearly hatching. In 1909 the first eggs 

 were observed on February 18th in the Bay plankton. 

 They were generally distributed in the Bay and open sea 

 throughout April and on to May 8th. The occurrences in 

 1910 were spread over a period of about two months. The 

 eggs were present in seven collections taken in the Bay and 

 in the open sea between February 28th and April 22nd. 

 The plankton of 1911 gave us the earliest record of plaice 

 eggs in the area during the six years. The eggs were 

 taken in the surface plankton collected on February 9th 

 and again on the 13th. They were only observed once 

 in March, on the 7th. The plankton collected from 

 April 4th to the end of that month showed that the 

 plaice eggs were generally distributed in the Bay and in 

 the open sea. The surface plankton collected on 

 March 4th contained the first eggs observed in 1912. 

 They were present from that date onward to April 15th. 

 Larval and post-larval pleuronectids were frequently 

 captured in the surface plankton between March 11th 

 and the end of April during the six years' investigations, 

 but they were generally too much mutilated to identify 

 correctly. One post-larval plaice, 8'8 mm. in length, 

 was taken in the surface net on April 1st, 1907. The 

 stomach contained a single copepod nauplius. 



We have found eggs of plaice in the plankton 

 collected in Cardigan Bay near the Patches Buoy off 

 Aberystwyth in December and January. 



Pieuronectes limanda, Linn. — Dab. 



The eggs of the dab, which are about the smallest 

 that are met with in the plankton collected during the 



