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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.
Maculotriton bracteatus
BPBM 251034
George Willet; Ditlev Due Thaanum, 1935
Laysan
Leptachatina tenebrosa
BPBM 88980
G. Willet, 1928
Kauaʻi
Ischnochiton mertensii
BPBM 225179
Geo. Willet; Thaanum, 1914
Alaska
Ischnochiton acrior
BPBM 225184
G. Willet; Thaanum, 1913
Mexico
Ischnochiton interstinctus
BPBM 225186
Geo. Willet; Thaanum, 1913
Alaska
Ischnochiton interstinctus
BPBM 225187
Geo. Willet; Thaanum, 1914
Alaska
Ischnochiton willetti
BPBM 225188
Geo. Willet; Thaanum, 1917
Alaska
Crepipatella lingulata
BPBM 257345
Geo. Willet; Thaanum, Ditlev
Alaska