Table 262.— Bathymetric occurrence of Petricola pholadif ormis , 

 based on 7 samples and 27 specimens. 



Depth range (m) 



Percentage of 



Samples 



Specimens 



-Bathymetric occurrence of Corbulidae, 

 based on 56 samples and 150 specimens. 



Depth range {m) 



Percentage of 



Samples 



Specimens 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



85.7 

 14.3 



96.3 

 3.7 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



58.9 



21.4 



17.9 



1.8 



56.0 

 24.7 

 18.0 



1.3 



Total 



■ 100.0 



Total 



100.0 



Table 263. —Occurrence of Petricola pholadiformis in bottom 



sediments, based on three samples and six specimens. 



Table 267.- 



-Occurrence of Corbulidae in bottom sediments, 

 based on 56 samples and 150 specimens. 



Bottom type 



Percentage of 



Samples 



Specimens 



Bottom type 



Percentage of 



Samples 



Specimens 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



33.3 



33.3 

 33.3 



100.0 



66.6 

 16.7 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



5.3 

 37.5 



41.1 

 14.3 



4.0 

 38.0 

 38.0 

 18.7 



Table 264. 



-Bathymetric occurrence of My a arenaria. 

 based on 62 samples and 281 specimens. 



Depth range {m} 



Percentage of 



Samples 



Specimens 



Table 268,--Bathymetric occurrence of Corbula contracta, 

 based on 22 samples and 46 specimens. 



Depth range (m) 



Percentage of 



Samples 



Specimens 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



43.5 



16.1 



32.3 



8.1 



49.8 



10.0 



33.8 



6.4 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



13.6 

 27.3 

 45.5 

 13.6 



8.7 

 28.3 

 41.3 

 21.7 



Total 



100.0 



Total 



Table 265.- 



■Occurrence of My a arenaria in bottom sediments, 

 based on 53 samples and 262 specimens. 



Table 269,— Occurrence of Corbula contracta in bottom 



sediments, based on 19 samples and 41 specimens. 



Bottom type 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Percentage of 



Samples 



1.9 



5.7 

 5.7 

 1.9 



13.2 

 37.7 

 13.2 

 20.7 



Specimens 



0.4 

 2.3 

 1.5 

 0.4 



5.0 

 41.6 

 29.3 

 19.5 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Samples 



52.6 



31.6 



5.3 



10.5 



Specimens 



48.8 



26.8 



9.8 



14.6 



Total 



10O.C 



100.0 



Total 



100.0 



100.0 



164 



