268 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



32, 36.— Port Erin Bay, April Kith. April 17th 



Net used I. A 



Depth in fathoms 



Catch in c.cm 20 



Biddulphia mobiliensis 



Chaetoceros contortimi 



,, decipiens 



Coscinodiscus concinnus 



Rhizosolenia semispina 



,, shrubsolei 



Thalassiosira nordenskioldii 



Lauderia borealis 



Ceratium fusus 



,, tripos 



Peridinium sp 



Medusoid gonophores 



Sagitta bipunctata 



Larval Polychaeta 



" Mitraria " 



Crab zoea 



Mysis stage of Crangon 



Nephrops, 1st stage 



Calanus helgolandicus 



Pseudocalanus elongatus 



Temora longicornis 



Centropages hamatus 



Acartia clausi 



Oithona similis 



Anomalocera juv 



Copepod nauplii 



juv 



Barnacle nauplii 



,, cypris stage 



Oikopleura sp 



Fish eggs — 



Pvockling — 



Common Dragonet 2 



Bib 1 



Topknot 1 



Sprat — 



Dab — 



Young fishes — 



Clupeoid 2 



Gadoid — 



T.B 





 hi 



I. A 







26 



36,000 



3,000 



17,000 

 500 



1,000 



1,500 



3 



10 



300 



150 



800 

 4,600 



100 

 1,250 



250 



50 



6,000 



10,000 



1,000 



200 

 2,250 



40,000 



1.000 



23,000 



1,000 



500 



1,000 



2,000 



3 



10 



300 



50 



350 



2,800 



. 50 



800 



100 



50 



11,500 



12.000 



350 



200 



2,250 



4 

 3 

 2 

 3 



57.000 

 8.000 

 5.000 



22.000 

 1,000 

 2,000 

 2,000 



500 



(U 



30 



2,100 



500 



. 240 



1,800 



6,000 



16 



625 



210 



40.000 



15,000 



2,100 



80 

 2.850 



85.000 

 6.000 

 5.000 



20.000 



2,000 

 500 



3,000 



1,000 



92 



15 



920 



1 

 2 



130 

 980 

 4,400 

 8 

 720 

 530 



25,000 



16,000 



920 



SO 



2.400 



both Diatoms and Copepoda had increased considerably 

 (see Forms 32, 36). 



Copepod Nauplii, however, seem to rise and fall in 

 number on the same dates as the Diatoms: bnt on the 



