45 



find out whether or not there were any ova free in the 

 cavity between the mantle and the body. The sizes of 

 the ova are given in the accompanying lists ; we usually 

 found a few of the ova free in the mantle cavity when the 

 specimen under examination was a female and when the 

 ovarian ova were at or about maturity. 



Grange over Sands 



Grange over Sands 

 Grange Banks. 



LythamNorth side 

 of Horse Bank 



Morecambe. 

 Baicliff Sands. 

 Morecambe. 



Lytham, Horse 

 Bank. 



Lytham. 

 Leasowe Shore. 



Duddon Sands. 



Lytham, Horse 

 Bank. 



Lytham, Horse 

 Bank. 



Lytham, 

 Salthouse Bank. 



Grange over Sands 



H-n 



^-1 



n-n 



1 -If 



n-H 

 i-i 

 i-ii 

 i-ig 



U-lg 



li 



i-u 



6 female, nearly ripe. 

 6 male, nearly ripe. 



10 female 

 2 male 



immature 



7 female ) about ^ 

 4 male ( mature. 



4 female ) 

 6 male i 



immature. 



13 female ) about ^ 

 10 male \ mature. 



8 female ) about ^ 



4 male ) mature. 



5 female ) about ^ 



3 male \ mature. 



8 female ova •07-"12m. 



4 male sperms moving. 



7 female, ova •l-"12m. 



6 male sperms moving. 



8 female, ova '1 m. 



6 male, si)erms not 

 moving. 



10 female, ova "1 m. 

 5 male, s})erms not 

 moving. 



7 female, ova 'OQ-lm. 



5 male, siierms not 

 moving. 



7 female, ova '1 m. 



5 male, sperms not 

 moving. 



4 female, ova "1 m. 



8 male, sperms not 

 moving. 



12 Empty. 

 12 Empty. 



11 Spores, etc. 



10 Vegetable 

 debris. 



23 Empty. 



12 Empty. 



8 Vegetable debris 



12 Sand and Veg- 

 etable debris. 



8 Empty, 4 Sand 

 and Vegetable 

 debris. 



14 Empty. 



15 Empty. 



12 Vegetable 

 debris. 



12 Vegetable 

 debris. 



12 Sand only. 



