3 



— 



3 



30 

 15 



07 



7 











830 



100 



325 



23.(10(1 



25 



8 



10 



700 



2.") 



5 



10 



21 N i 



150 



8 



100 



6,000 



3,250 



35 



15 



6,500 



1 50 



4 



G 



— 



25 



— 



— 



300 



— 



150 



4 



— 



— 



22,500 



340 



2,450 



2 

 38,000 



750 



40 



GOO 



19,000 



200 



20 



50 



500 



500 



20 



50 



500 



900 



25 



to 



— 



1,500 



— 



— 



2,000 



— - 



— 



— 



6 



76 TRANSACTIONS LIVERPOOL BTOLOOICAL SOCIETY, 



Mysis stage of Cratigon 5 



Podon intermedium 10 



Calanus helgolandicus 34 



Pseudocalanus elongatus ... 4,500 



'femora longicornis 200 



Centropages hamatus 150 



Acartia clausi 1 ,255 



Oithona similis 4.500 



Paracalanus parvus 200 



Isias clavipes 



Leptopsyllus sp — 



Ameira intermedia — 



Zaus goodsiri — 



Copepod nanplii 1 7,000 



Juv 15,000 



Gasteropods, larval 250 



Lamellibranchs, larval 250 



Oikopleura sp 875 



Aseidian eggs 1 ,500 



Yoimgfish.es — 



Comparison of Three Fishing Banks. 



In the " Annals and Magazine " for 1839 Professor 

 Edward Forbes published a short paper entitled, " On a 

 shell-bank in the Irish Sea, considered Zoologically and 

 Geologically " (Ann. and Mag. Nat. Hist., Vol. IV., 1840, 

 p. 217), in which he recorded the results obtained during 

 some years of occasional dredging on a scallop bank lying 

 opposite Ballaugh off the North-West of the Isle of Man. 

 As these observations extended over seven years previous 

 to 1839, if we reckon from a period about the middle of his 

 work we may consider that we are now dealing with a 

 record of the condition of the marine fauna on this bank 

 well over TO years ago. It seemed to me that we had here 

 an opportunity, such as rarely occurs, of determining 

 whether any change had taken place in a limited, well- 

 defined area after a considerable interval of time. Forbes, 

 unfortunately, did not deal with all groups of animals, 

 and in fact he paid most attention to Mollusca, and only 

 recorded in addition the Echinodermata and a few of the 





