Table 38. —Bathymetric occurrence of Yoldia sapotilla, 

 based on 278 samples and 1,980 specimens. 



Table 42. --Bathymetric occurrence of Yoldia sp. , 

 based on 88 samples and 303 specimens. 



Depth range (m) 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



Percentage of 



Samples 



0.7 

 9.7 

 54.7 

 21.2 

 13.7 



Specimens 



0.1 

 8.2 

 66.4 

 17.0 

 8.3 



Depth range (m) 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



Percentage of 



Samples 



1.1 



4.5 



14.8 



43.3 



35.2 



1.1 



Specimens 



0.7 

 1.7 

 20.1 

 51.4 

 24.8 



1.3 



Total 



Total 



100.0 



Table 39. --Occurrence of Yoldia sapotilla in bottom sediments, 

 based on 270 samples and 1,970 specimens. 



Table 43. — Occurrence of Yoldia sp. in bottom sediments, 

 based on 83 samples and 272 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 



0.4 

 5.2 

 0.4 

 0.7 

 27.8 

 33.3 

 5.9 

 26.3 



100.0 



<0.1 

 2.7 



<0.1 

 0.2 



25.2 



37.9 

 6.6 



27.4 



100.0 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



1.2 

 2.4 

 9.7 



9.7 

 31.3 

 12.0 

 33.7 



100.0 



0.4 

 4.8 

 5.9 



6.9 

 31.2 

 10.7 

 40.1 



100.0 



Table 40. 



-Bathymetric occurrence of Yoldia thraciaef ormis . 

 based on 46 samples and 158 specimens. 



Table 44. —Bathymetric occurrence of Portlandia fraterna, 

 based on three samples and five 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 



4.3 

 65.3 

 26.1 



4.3 



1.3 

 73.4 

 23.4 



1.9 



0-24 



25-49 



50-99 



100-199 



200-499 



500-999 



1000-1999 



2000-3999 



66.7 

 33.3 



60.0 

 40.0 



Total 



Total 



Table 41. — Occurrence of Yoldia thraciaeformia in bottom 



sediments, based on 41 samples and 144 specimens. 



Table 45. —Occurrence of Portlandia fraterna in bottom 



sediments, based on three samples and five specimens. 



Bottom type 



Percentage of 



Percentage of 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shell 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



2.4 

 24.4 



12.2 

 12.2 

 48.8 



100.0 



Specimens 



2.1 

 14.6 



7.6 



34.0 

 41.7 



Bottom type 



Gravel 



Sand-gravel 



Till 



Shell 



Sand-shel 1 



Sand 



Silty sand 



Silt 



Clay 



Total 



Samples 



66.7 

 33.3 

 100.0 



Specimens 



60.0 



40.0 

 100.0 



136 



