Ascidia aculeata Alder, 1863 accepted as Ascidiella aspersa (Müller, 1776) (original description)
Ascidia obliqua Alder, 1863 (original description)
Ascidia pulchella Alder, 1863 accepted as Ciona intestinalis (Linnaeus, 1767) (original description)
Ascidia pustulosa Alder, 1863 accepted as Ascidiella aspersa (Müller, 1776) (original description)
Botrylloides pusilla Alder, 1863 accepted as Botrylloides leachii (Savigny, 1816) (original description)
Botrylloides sparsa Alder, 1863 accepted as Botrylloides leachii (Savigny, 1816) (original description)
Cynthia comata Alder, 1863 accepted as Polycarpa comata (Alder, 1863) (original description)
Cynthia granulata Alder, 1863 accepted as Polycarpa pomaria (Savigny, 1816) (original description)
Cynthia squamulosa Alder, 1863 accepted as Pyura squamulosa (Alder, 1863) (original description)
Cynthia sulcatula Alder, 1863 accepted as Polycarpa pomaria (Savigny, 1816) (original description)
Cynthia violacea Alder, 1863 accepted as Polycarpa violacea (Alder, 1863) (original description)
Molgula socialis Alder, 1863 (original description)
Parascidia flemingii Alder, 1863 accepted as Aplidium turbinatum (Savigny, 1816) (original description)
Parascidia forbesi Alder, 1863 accepted as Aplidium turbinatum (Savigny, 1816) (original description)
Parascidia forbesii Alder, 1863 accepted as Aplidium turbinatum (Savigny, 1816) (original description)
Sidnyum flemingii (Alder, 1863) accepted as Aplidium turbinatum (Savigny, 1816) (original description)
Styela opalina Alder, 1863 accepted as Polycarpa pomaria (Savigny, 1816) (original description)
Styela violacea (Alder, 1863) accepted as Polycarpa violacea (Alder, 1863) (original description)