SEA-FISHERIES LABORATORY. 151 



that the constituents were fairly uniformly diffused at 

 this place at the time the samples were taken. 



(1) (2) (3) 



Biddulphia ab. ... ab. ... ab. 



Coscinodiscus ab. ... ab. ... ab. 



Rhizosolenia ab. ... ab. ... ab. 



Ceratium tripos c. ... c. ... c. 



Ceratium fusus c. ... c. ... c. 



Alcyonium eggs r. ... r. ... r. 



Sagitta — ... — ... r. 



Autolytus r. ... r. ... r. 



Crab zoea r. ... r. ... c. 



Copepoda r. ... r. ... c. 



Temora r. ... r. ... c. 



Paracalanus r. ... r. ... r. 



Acartia r. ... r. ... c. 



Ascidian eggs c. ... c. ... c. 



Oikopleura r. ... r. ... r. 



Dab eggs v.ab. ... v.ab. ... v.ab. 



Haddock eggs v.ab. ... v.ab. ... v.ab. 



Whiting eggs v.ab. ... v.ab. ... v.ab. 



Bib eggs v.ab. ... v.ab. ... v.ab. 



Collections taken at the North end of Cardigan 

 Bay, on April 27th, show considerable variation in the 



constituents of the plankton, as will be seen from the 

 following tables : — 



Tremadoc Off Off Kilan 



Bay Llanbedrog. Head. 



Biddulphia — ... — ... r. 



Chsetoceros r. ... — ... — 



Coscinodiscus ab. ... — ... r. 



Rhizosolenia r. ... — ... — 



Alcyonium eggs r. ... — ... — 



Sagitta r. ... r. ... r. 



Crab zoea — ... r. ... r. 



Nauplii of barnacles — ... c. ... c. 



Ostracod stage of barnacles c. ... c. ... c. 



Copepoda c. ... c. ... r. 



Pseudocalanus — ... fr. ... — 



Temora fr. ... fr. ... — 



Centropages fr. ... fr. ... — 



Acartia fr. ... fr. ... r. 



Oithona r. ... c. ... — 



Brill eggs — ... — ... r. 



Haddock eggs — ... — ... r. 



Pollack eggs — ... r. ... — 



Sprat eggs *..... r. ... r. ... r. 



Rockling eggs — ... r. ... — 



Spotted Dragonet eggs — ... r. 



