150 



TRANSACTIONS LIVEEPOOL BIOLOGICAL SOCIETY. 



Grange over Sands 



Grange over Sands 

 Kent's Bank. 



Grange over Sands 



Grange over Sands 



Grange over Sands 

 Waded Scar. 



Duddon Sands, 



Grange Banks. 



Kent's Bank, 

 Cockle Beds. 



Duddon Sands. 



Grange Banks. 



Grange Banks. 



Oct. 8 



12 „ 



H-U ., 



Oct. 16 



12 ,, 



lrlft „ 



Oct. 22 



12 „ 



i-ii „ 



Oct. 29 



12 „ 



i-H „ 



Nov. 5 



12 •, 



i-ii „ 



Nov. 6 



12 „ 



i-i| „ 



Dec. 1 



12 „ 



14- U » 



Dec. 4 



14 „ 



i-ii „ 



Dec. 11 



10 „ 



i -if „ 



Dec. 11 



12 „ 



n 



Dec. 19 



12 „ 



i-ii „ 



4 female, ova '15 m. 



8 spent. 



3 female, ova '14 m. 



9 spent. 



4 female, ova - 165 m. 



8 male, sperms not 

 moving. 



12 spent. 



2 female, ova - 15-18m 



10 spent. 



2 females, ova *14 m. 



4 male, sperms moving 

 6 spent. 



12 males, immature. 



1 female, ova '14 m. 



13 male, immature. 



2 female, ova '14 m. 



5 male, sperms moving 



3 male, immature. 



11 male, sperms mov- 

 ing. 



11 male, immature. 



3 female ova '12-*15m 



9 male; immature. 



12 Empty. 

 10 Empty. 



12 Empty. 



12 Empty. 

 12 Empty. 



12 Empty. 



12 Empty. 

 14 Empty. 



10 Empty. 



12 Empty. 

 12 Empty. 



In addition to the great value of cockles for their own 

 sake, we desire to point out that they are probably of great 

 economic importance in connection with the nourishment 

 of young true fish. The inter-dependence of different 

 forms of life in the sea is a very marked thing, the presence 

 of one species frequently attracts another, and sands that 

 contain cockles seem usually to have other burrowing 

 mollusca and many amphipods and other invertebrates 

 and so no doubt form an attractive feeding ground for 

 fish.- 



Shrimps and Shanks. 



During the year 290 shrimps (Crangon vulgaris) have 

 been examined in order to ascertain further particulars in 

 regard to the food and times of spawning. 



