Table 166.— Bathymetric occurrence of Cyclocardia borealis, 

 based on 473 samples and 8,839 specimens. 



Table 170r-Bathymetric occurrence of Cyclocardia sp. 

 based on 16 samples and 22 specimens. 



Depth range (m) 



Percentage of 



Depth range (m) 



Percentage of 



Samples 



Specimens 



Samples 



Specimens 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



3.0 

 12.7 

 55.8 

 24.1 



4.4 



0.4 

 11.3 

 62.6 

 24.7 



1.0 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



50.0 

 37.5 

 12.5 



59.1 



31.8 

 9.1 



Total 



Total 



Tablel67. — Occurrence of Cyclocardia borealis in bottom sediments, 

 based on 430 samples and 8,694 specimens. 



Tablel71.— Occurrence of Cyclocardia sp. in bottom sediments, 

 based on 16 samples and 22 specimens. 



Bottom type 



Percentage of 



Samples 



Specimens 



Bottom type 



Percentage of 



Samples 



Specimens 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shel 1 



Sand 



Silty sand 



Silt 



Clay 



Total 



7.4 

 10.2 

 12.3 



1.2 



3.7 

 36.3 

 13.1 



2.1 

 13.7 



100.0 



3.5 

 4.3 



38.4 

 0.4 

 0.5 



15.0 



15.2 

 0.6 



22.1 



100.0 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shel 1 



Sand 



Silty sand 



Silt 



Clay 



Total 



6.2 

 50.0 

 31.4 



6.2 



4.5 

 50.0 

 31.9 



9.1 



100.0 



Table 168.--Bathymetric occurrence of Cyclocardia novanqliae , 

 based on 26 samples and 89 specimens. 



Table 172. --Bathymetric occurrence of Pleuromeris tridentata, 

 based on 61 samples and 168 specimens. 



Depth range (m) 



Percentage of 



Samples 



Specimens 



Depth range (m) 



Percentage of 



Samples 



Specimens 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



7.7 

 65.4 

 23.1 



3.8 



2.2 



89.9 



6.6 



1.1 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



42.7 



44.3 

 9.8 

 1.6 

 1.6 



32.1 



56.0 



9.5 



1.2 



1.2 



Total 



100.0 



Total 



100.0 



Table 169^-Occurrence of Cyclocardia novanqliae in bottom sediments, 

 based on 25 samples and 88 specimens. 



Table 173. — Occurrence of Pleuromeris tridentata in bottom 



sediments, based on 61 samples and 168 specimens. 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



20.0 

 44.0 

 12.0 

 8.0 

 4.0 

 8.0 



4.0 

 100.0 



Specimens 



6.8 



43.2 



27.3 



18.2 



1.1 



2.3 



1.1 

 100.0 



Bottom type 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



6.6 



41.0 



47.5 



3.3 



Specimens 



2.4 



7.1 

 23.2 

 65.5 



1.8 



152 



