Arabella attenuata Treadwell, 1906 accepted as Notocirrus attenuatus (Treadwell, 1906) (original description)
Arabella iridescens Treadwell, 1906 (original description)
Castalia oculata Treadwell, 1906 accepted as Leocrates oculatus (Treadwell, 1906) (original description)
Eunice bilobata Treadwell, 1906 (original description)
Eunice hawaiiensis Treadwell, 1906 accepted as Eunice hawaiensis Treadwell, 1906 (original description)
Eunice interrupta Treadwell, 1906 (original description)
Eunice nicidioformis Treadwell, 1906 (original description)
Eupanthalis oahuensis Treadwell, 1906 accepted as Eupanthalis mutilata (Treadwell, 1906) (original description)
Goniada brunnea Treadwell, 1906 (original description)
Harmothoe tuberculata Treadwell, 1906 accepted as Bathynoe tuberculata (Treadwell, 1906) (original description)
Hermodice pennata Treadwell, 1906 accepted as Pherecardia striata (Kinberg, 1857) (original description)
Lanice expansa Treadwell, 1906 accepted as Pista expansa (Treadwell, 1906) (original description)
Laonome punctata Treadwell, 1906 accepted as Pseudobranchiomma punctata (Treadwell, 1906) (original description)
Laonome punctata Treadwell, 1906 accepted as Sabellastarte indica (Savigny, 1822) accepted as Sabellastarte spectabilis (Grube, 1878) (original description)
Lumbriconereis grandis Treadwell, 1906 accepted as Lumbrineris grandis Treadwell, 1906 (original description)
Lumbriconereis minuta Théel, 1879 accepted as Lumbrineris minuta (Théel, 1879) (source of synonymy)
Lumbriconereis minuta Treadwell, 1906 accepted as Lumbrineris minuscula Moore, 1911 (original description)
Lumbriconereis minuta Théel, 1879 accepted as Lumbrineris minuta (Théel, 1879) (original description)
Lumbriconereis minuta Treadwell, 1906 accepted as Lumbrineris minuscula Moore, 1911 (source of synonymy)
Polynoe alba Treadwell, 1906 accepted as Lepidasthenia alba (Treadwell, 1906) (original description)
Polynoe lucida Treadwell, 1906 accepted as Lepidasthenia lucida (Treadwell, 1906) (original description)
Polynoe mutilata Treadwell, 1906 accepted as Panthalis mutilata (Treadwell, 1906) (original description)
Polynoe spicula Treadwell, 1906 accepted as Lepidonotus spiculus (Treadwell, 1906) (original description)
Potamilla californica Treadwell, 1906 accepted as Notaulax californica (Treadwell, 1906) (original description)
Potamilla elongata Treadwell, 1906 accepted as Potamethus elongatus (Treadwell, 1906) (original description)
Sabellaria setosa Treadwell, 1906 accepted as Phalacrostemma setosa (Treadwell, 1906) (original description)
Terebella flabellum Baird, 1865 accepted as Lanice flabellum (Baird, 1865) (new combination reference)
Terebella parvabranchiata Treadwell, 1906 (original description)
Terebellides tentaculata Treadwell, 1906 accepted as Melinnexis tentaculata (Treadwell, 1906) accepted as Melinnopsis tentaculata (Treadwell, 1906) (original description)
Thelepus branchiatus Treadwell, 1906 (original description)
Vanadis fuscapunctata Treadwell, 1906 accepted as Vanadis formosa Claparède, 1870 (original description)
Vanadis minuta Treadwell, 1906 (original description)

Hawaiian Islands for Lanice expansa Treadwell, 1906 

Holotype USNM 5225, geounit Hawaiian Islands, identified as Pista expansa (Treadwell, 1906)