SEA-FISHERIES LABORATORY. 237 



2Rpfwppn Canna and Rum Jul ^ 14th ' 1910Ju] y 13th > 191 1 



. Between uanna ana num. 128 fathoms 130 fathomg 



Chaetoceras constrictum 5,714,300 — 



„ curvisetum 41,714,200 — 



debile 5,285,700 — 



decipiens 3,857,140 1,050 



spp 15,214,275 — 



Coscinodiscus radiatus 4,690 420 



Guinardia flaccida 1,040 — 



Lauderia borealis 23,960 — 



Nitzschia seriata 357,140 — 



Pleurosigma sp x — 



Rhizosolenia semispina 142,750 840 



„ shrubsolii 29,175 — 



stolterfothii 17,715 — 



„ styliformis — 420 



Ceratium fusus 1,040 — 



„ intermedium — 200 



tripos 5,210 3,350 



Peridinium spp 18,750 — 



Tintinnidae 22,920 630 



Medusae 50 — 



Sagitta 6 7 



Polychaet larvae x 200 



Plutei 520 — 



Gastropod larvae 56,270 — 



Limacina retro versa — 8,400 



Calanus helgolandicus 500 520 



Pseudocalanus elongatus 3,125 2,100 



Acartia clausi 1,215 — 



Oithona similis 4,430 3,150 



Nauplii 23,445 9,650 



Evadne nordmanni — 200 



Oikopleura 2,080 2,300 



This again shows a zooplankton in 1911 at a locality 

 where at the same time of year in 1910 there was a 

 marked phytoplankton. The difference is due again 

 simply to the absence of the millions of Diatoms that 



characterised the locality in 1910 — and the presence of 

 Pteropods in 1911. 



