Table 182. — Bathymetric occurrence of Astarte elliptica , based 

 on 42 samples and 317 specimens. 



Table 186.— Bathymetric occurrence of Astarte quadrans , based 

 on 28 samples and 48 specimens. 



Depth range (m) 



Percentage of 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



Samples 



2.4 



9.8 



75.6 



12.2 



Specimens 



0.6 



9.5 



83.2 



6.7 



Depth range (m) 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



Percentage of 



Samples 



14.3 

 32.2 

 46.4 



7.1 



Specimens 



16.7 

 22.9 

 56.2 

 4.2 



Total 



Total 



100.0 



Table 183.- 



■Occurrence of Astarte el liptica in bottom sediments, 

 based on 31 samples and 284 specimens. 



Table 187. — Occurrence of Astarte quadrans in bottom sediments, 

 based on 26 samples and 46 specimens. 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



12.9 



22.6 



19.4 



9.7 



3.2 



19.3 



3.2 



9.7 



100.0 



Specimens 



17.6 

 3.9 

 20.8 

 41.2 

 0.3 

 3.9 

 3.5 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



19.3 

 3.8 



7.7 

 69.2 



Specimens 



13.0 

 2.2 



4.4 

 80.4 



Table 184.--Bathymetric occurrence of Astarte nana , based 

 on 4 samples and 18 specimens. 



Table 188.- 



■Bathymetric occurrence of Astarte undata . 

 on 444 samples and 4,705 specimens. 



Depth range (m) 



Percentage of 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



Samples 



Specimens 



50.0 

 50.0 



33.3 

 66.7 



Depth range (m) 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



Percentage of 



Samples 



2.0 

 11.8 

 55.2 

 27.7 



2.7 

 0.6 



Specimens 



0.6 

 10.1 

 58.5 

 30.0 

 0.6 

 0.2 



Total 



100.0 



Total 



100.0 



Table 185.--0ccurrence of Astarte nana in bottom sediments, 

 based on 4 samples and 18 specimens. 



Table 189 .--Occurrence of Astarte undata in bottom sediments, 

 based on 444 samples and 4,705 specimens. 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



25.0 

 50.0 

 25.0 



Specimens 



11.1 

 66.7 

 22.2 



100.0 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



12.2 



10.7 



13.8 



2.7 



1.7 



30.3 



12.7 



3.2 



12.7 



100.0 



Specimens 



8.8 

 2.4 



37.2 

 6.4 

 0.8 



16.7 



16.2 

 1.4 



10.1 



100.0 



154 



