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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.
Dreissena polymorpha
BPBM 196728
H.G. Barnacle; Joseph Swift Emerson, 1882
England
Dreissena polymorpha
BPBM 196946
H.C. Higgins; Joseph Swift Emerson, 1925
England
Dreissena polymorpha
BPBM 285166
Thaanum/Langford Collection
England
Dreissena polymorpha
BPBM 285167
Thaanum/Langford Collection
Denmark
Dreissena polymorpha
BPBM 670
W.H. Pease
England