Amaroucium densum Giard, 1872 accepted as Aplidium densum (Giard, 1872) (original description)
Aplidium zostericola Giard, 1872 accepted as Aplidium pallidum (Verrill, 1871) (original description)
Astellium Giard, 1872 accepted as Diplosoma Macdonald, 1859 (original description)
Astellium spongiforme Giard, 1872 accepted as Diplosoma listerianum (Milne Edwards, 1841) (original description)
Botryllidae Verrill, 1871 accepted as Styelidae Herdman, 1881 (additional source)
Botrylloides clavelina Giard, 1872 accepted as Botrylloides leachii (Savigny, 1816) (original description)
Botrylloides insigne Giard, 1872 accepted as Botrylloides leachii (Savigny, 1816) (original description)
Botrylloides prostratum Giard, 1872 accepted as Botrylloides leachii (Savigny, 1816) (original description)
Botryllus aurolineatus Giard, 1872 accepted as Botryllus schlosseri (Pallas, 1766) (original description)
Botryllus calendula Giard, 1872 accepted as Botryllus schlosseri (Pallas, 1766) (original description)
Botryllus marionis Giard, 1872 accepted as Botryllus schlosseri (Pallas, 1766) (original description)
Botryllus morio Giard, 1872 accepted as Botryllus schlosseri (Pallas, 1766) (original description)
Botryllus pruinosus Giard, 1872 accepted as Botryllus schlosseri (Pallas, 1766) (original description)
Botryllus rubigo Giard, 1872 accepted as Botryllus schlosseri (Pallas, 1766) (original description)
Circinalium Giard, 1872 accepted as Aplidium Savigny, 1816 (original description)
Circinalium concrescens Giard, 1872 accepted as Aplidium turbinatum (Savigny, 1816) (original description)
Didemnum cereum Giard, 1872 accepted as Trididemnum cereum (Giard, 1872) (original description)
Didemnum niveum Giard, 1872 accepted as Trididemnum cereum (Giard, 1872) (original description)
Didemnum sargassicola Giard, 1872 accepted as Trididemnum cereum (Giard, 1872) (original description)
Fragarium Giard, 1872 accepted as Aplidium Savigny, 1816 (original description)
Fragarium elegans Giard, 1872 accepted as Aplidium elegans (Giard, 1872) (original description)
Leptoclinum fulgidum Giard, 1872 accepted as Didemnum fulgens (Milne Edwards, 1841) (original description)
Leptoclinum lacazei Giard, 1872 accepted as Polysyncraton lacazei (Giard, 1872) (original description)
Leptoclinum perforatum Giard, 1872 accepted as Lissoclinum perforatum (Giard, 1872) (original description)
Lithonephrya Giard, 1872 accepted as Molgula Forbes, 1848 (original description)
Lithonephrya descipiens Giard, 1872 accepted as Molgula complanata Alder & Hancock, 1870 (original description)
Polyclinum sabulosum Giard, 1872 accepted as Polyclinum aurantium Milne Edwards, 1841 (original description)
Pseudodidemnum Giard, 1872 accepted as Diplosoma Macdonald, 1859 (original description)
Pseudodidemnum crystallinum Giard, 1872 accepted as Diplosoma listerianum (Milne Edwards, 1841) (original description)