MARINE BIOLOGICAL STATION AT FORT ERIN. 



71 





NetB = 16c.cm. 



Net C = 15-5 cm 



Larval Polychaeta 



650 ... 







Balaims Nauplei 



3,000 ... 







,, Cypris stage 



50 ... 







Copepoda Nauplei 



7,000 ... 



2,000 



juv 



. 13,000 ... 







Calanus helgolandicus 



100 ... 



6 



Pseudocalanus elongatus .. 



850 ... 



500 



Temora longicornis 



2,470 ... 



4,750 



Oithona siinilis 



100 ... 



50 



Acartia clausi 



250 ... 



200 



Centropages hamatus 



... 



200 



Coscinodiscus concinnus . 



8,000 ... 



14,000 



Biddulphia mobiliensis 



. 40,000 ... 



70,000 



Khizosolenia semispina 



1,000 ... 



3,000 



Lauderia borealis ... 



1,000 ... 







Thalassiosira nordenskioldii 



2,000 ... 



7,000 



„ subtilis ... 



6,000 ... 







Chaetoceros teres 



... 



1,000 



Peridinium sp. 



500 ... 







Plutei 



500 ... 



1,000 



Oikopleura sp. 



2,000 ... 



150 



Medusoids ... 



50 ... 



25 



Sagitta bipuiictata ... 



... 



48 



Crab Zoeas 



... 



10 



This shows very clearly 



that the two gatlu 



wrings, althougl 



ahke in quantity, were unlike in quality. 





As a sample of the manner in which, as the result of 

 Mr. Scott's work, we are now recording these plankton 

 hauls, I give here the following table dealing with one of 

 the off-shore stations on a forenoon run in the 

 " Ladybird." The shear-net haul was taken on the way 

 in, half-way between the Calf Island and Port Erin. 



