SEA-FISHERIES LABORATORY. 



155 



The other organisms, with the exception of the fish eggs, 

 appeared to be fairly uniform in their distribution on 

 that date. A comparison of the plankton at the Bibble 

 entrance on the above date with that of seven days 

 previously shows a great change in the quantity of 

 Diatoms on the two dates. On the first date three genera 

 were represented, one of which was present in large 

 numbers on the second visit, one of the forms had 

 disappeared, and the prevalent genus had decreased so 

 very much in quantity that only a few specimens were 

 detected. 



On May 24th two tow -nettings were taken in 

 Cardigan Bay, one near the Patches Buoy and the other 

 off New Quay Head, about fourteen miles S.W. from the 

 former. A third collection was made off Dinas Head, 

 about twenty-three miles in a westerly direction from 

 New Quay Head. These three were all from inside the 

 territorial limit, and give an idea of the conditions of the 

 plankton along that portion of the Welsh coast. 



Pleurobrachia . . 

 Sarsia tubulosa . . 



Sagitta 



Autolytus 



" Mitraria " 



Podon 



Crab zoea 



Megalopa 



Copepoda 



Calanus 



Pseudocalanns 



Paracalanus . . 



Temora 



Centropages . . 



Oikopleura 



Brill eggs 



Turbot eggs 



Gurnard eggs 



Sprat eggs 



Rockling eggs .. 



tches 

 uoy. 



New Quay 

 Head. 



Dinas 

 Head. 



c. 



— 



r. 



r. 



c. 



c. 



r. 



— 



r. 



r. 



r. 



— 



— 



r. 



c. 



ab. 



ab. 



c. 



c. 

 c. 

 c. 

 c. 



c. 

 c. 

 c. 

 c. 



fr. 

 fr. 

 fr. 

 fr. 



r. 



r. 



— 



r. 





r. 



— 





r. 



The distribution of the organisms in this area was 

 evidently far from uniform. The Copepoda in the first 



