50 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Parapontella), although present at the surface on the 

 27th, were absent on the following day. On the other 

 hand, Crab Zoea, Evadne, and two kinds of fish eggs, 

 noted on the 28th, were absent on the previous day. The 

 deep gatherings differed from each other and also 

 from the surface. On the 27th, Biddulphia, Sagitta, 

 Tomopteris, Crab Zoea, and Centropages, were present in 

 the deep net, but not at the surface. On the following 

 day, when a smaller bulk of material was taken, 

 Biddulphia, Ceratium, Med\isoid gonophores, Tomopteris, 

 and Podon, all present the day before, had disappeared. 

 On the 28th, hauls taken a few miles to the North, off 

 Jurby, differed greatly in quantity from those off Niarbyl, 

 the surface net having 13 c.c. and that at 10 fathoms 9 c. 

 On September 11th and 12th the water close under 

 the East side of the Calf Island was investigated by means 

 of old and new surface nets, Apstein net, Hensen net, 

 and weighted ordinary tow-net. On the first date the old 

 surface net captured 8 c.c. and the new one 5 c.c. of 

 organisms. On the following day the old net contained 

 1J c.c. and the new one 2 c.c. of plankton. The Hensen 

 net, worked at 5 to 7 fathoms, collected 2\ c.c. each day. 

 The deep net, at 10 fathoms, took 15 c.c. on the 11th and 

 only 6 c.c. on the 12th. The old and new nets working 

 side by side on the 11th did not capture exactly the same 

 kind of organisms. The old net contained Autolytus, 

 Crab Zoea and Megalopa, and Idotea, not represented in 

 the new net; on the other hand, the new net captured 

 Coscinodiscus, Biddxdpliia, Ceratium, and Pseudocalanus, 

 which were not taken in the old net. The organisms 

 taken by these nets on the following day were almost 

 identical, the only difference being Calanus present in the 

 old net but not in the new one. Seven species of Copepoda 

 were noted in the surface gathering on the 11th 



