- Ascidia callosa Stimpson, 1852
- Ascidia geometrica Stimpson, 1852 accepted as Chelyosoma macleayanum Broderip & Sowerby, 1830
- Ascidia tenella Stimpson, 1852 accepted as Ciona intestinalis (Linnaeus, 1767)
- Boltenia rubra Stimpson, 1852 accepted as Boltenia ovifera (Linnaeus, 1767)
- Cynthia gutta Stimpson, 1852 accepted as Dendrodoa carnea (Rathke, 1806)
- Cynthia partita Stimpson, 1852 accepted as Styela canopus (Savigny, 1816)
- Cynthia subcaerulea Stimpson, 1852
- Cynthia vittata Stimpson, 1852 accepted as Pyura vittata (Stimpson, 1852)
- Glandula fibrosa Stimpson, 1852 accepted as Polycarpa fibrosa (Stimpson, 1852)
- Glandula mollis Stimpson, 1852 accepted as Cnemidocarpa mollis (Stimpson, 1852)
- Molgula arenata Stimpson, 1852
- Molgula producta Stimpson, 1852 accepted as Molgula complanata Alder & Hancock, 1870
- Molgula sordida Stimpson, 1852 accepted as Molgula manhattensis (De Kay, 1843)
- Pera pellucida Stimpson, 1852 accepted as Molgula griffithsii (MacLeay, 1825)