Restricted synonymy:
Spongia panicea n.sp. Pallas, 1766: 388; Linnaeus (Gmelin), 1791: 3823; Fleming, 1828: 520.
Spongia tomentosa n.sp. Linnaeus, 1767: 1299; Linnaeus (Gmelin), 1791: 3821; Montagu, 1818: 99.
Spongia cristata n.sp. Ellis and Solander, 1786: 186; Linnaeus (Gmelin), 1791: 3822; Montagu, 1818: 103; Templeton, 1836: 470.
Spongia tubulosa n.sp. Ellis and Solander, 1786: 188, pl.58 fig. 7
Spongia urens n.sp. Ellis and Solander, 1786: 187; Templeton, 1836: 470.
Spongia papillaris n.sp. Linnaeus (Gmelin), 1791: 3824; Esper, 1791-1794 (Spongia papillaris); Montagu, 1818: 90
Spongia compacta n.sp. Sowerby, 1806
Halichondria papillaris : Johnston, 1842
Halichondria panicea : Johnston, 1842: 114, pls. 10-11; Bowerbank, 1866: 229; Parfitt, 1868: 11; Norman, 1869: 297; McIntosh, 1874: 144; Bowerbank, 1874 (Halichondria panicea drawing): 97, pl. XXXIX figs. 1-6, pl. XL figs. 1-5; 1882: 98; Topsent, 1891a: 527; Topsent, 1894: 7; Maitland, 1897: 55; Topsent, 1899: 105; Lundbeck, 1902: 17, pl. 9 fig. 1; Arnesen, 1903: 5; Stephens, 1912: 25; De Beauchamp, 1914: 79; Stephens, 1917: 6; 1920: 9; Prenant, 1927: 33; Burton, 1930a: 494; Burton, 1930b; Burton, 1932: 168; Brøndsted, 1932: 24; Topsent, 1932: 2; Arndt, 1935: 103, 221; Alander, 1942: 28; Burton, 1948: 900; Lévi, 1950b: 12; Lilly et al., 1953; Burton, 1957: 35; Hartman, 1958a: 29, fig. 9; Burton, 1959a; Bruce et al., 1963: 47; Graat-Kleeton, 1965: 169; Borojevic et al., 1968: 16; Descatoire, 1969a: 198; Hamond, 1970: 87; Könnecker, 1973: 456; Frith, 1976: 355; Cabioch, 1973: 5; Van Soest, 1976; Benito, 1976: 497; Van Soest, 1977: 268; Van Soest, 1977a: S28, fig. 1; Rodriguez and Gondar, 1978: 52; Van Soest and Weinberg, 1980: 10; Van Soest et al., 1981: 40; Vethaak et al., 1982: 82, pl. 1 figs 1-5, pl. 2 figs. 1-5, pl. 4 fig. 4; Lombas, 1982: 45; Durán and Solórzano, 1982: 52; Van Soest, 1983: 29; Vethaak, 1983: 62; Ackers, 1983: 162; Bongers, 1983: 39; Hiscock et al., 1983 (1984): 25, pl. 3e; Ackers et al., 1985: 119, photos 1-6, 60; Solórzano, 1991: 39; Ackers et al., 1992: 103, photos 199-201.
Halichondria reticulata n.sp. Lieberkühn, 1859; Könnecker, 1973: 457; Van Soest and Weinberg, 1980: 10; Van Soest et al., 1981: 40.
Halichondria coccinea n.sp. Bowerbank, 1861a: 69.
Hymeniacidon thomasii n.sp. Bowerbank, 1866: 155; 1874: 75, pl. XXX figs. 1-3; 1882: 71.
Hymeniacidon brettii n.sp. Bowerbank, 1866: 158; 1874: 75, pl. XXX figs. 7-9; 1882: 75.
Hymeniacidon albescens n.sp. (pars) Bowerbank, 1866: 161; 1874: 78, pl. XXXI figs. 6-10; 1882: 70; Burton, 1947: 252.
Hymeniacidon membrana n.sp. Bowerbank, 1866: 165; 1874: 82, pl. XXXII figs. 11-12; 1882; 72.
Hymeniacidon reticulatus : Bowerbank, 1866: 159; 1874: 77, pl. XXXI figs. 1-3; 1882: 75.
Hymeniacidon fragilis n.sp. Bowerbank, 1866: 159; 1874: 76, pl. XXX figs. 10-12; 1882: 75.
Hymeniacidon fallaciosus n.sp. Bowerbank, 1866: 160; 1874: 78, pl. XXXI figs. 4-5; 1882: 75.
Hymeniacidon lactea n.sp. Bowerbank, 1866: 163; 1874: 82, pl. XXXII figs. 9-10; 1882: 72.
Halichondria glabra n.sp. Bowerbank, 1866: 232; 1874: 101, 353, pl. XLI figs 1-3; 1882: 99; Topsent, 1894: 7; Topsent, 1899: 105; Burton, 1932: 169; Arndt, 1935: 103; Bruce et al., 1963: 47.
Halichondria caduca n.sp. Bowerbank, 1866: 234; 1874: 101, pl. XLI figs. 9-11; 1882: 95.
Halichondria incerta n.sp. Bowerbank, 1866: 237; 1874,: 102, pl. XLI figs 15-17; 1882: 96.
Hymeniacidon coccinea : Bowerbank, 1866: 156; 1874: 75, 353, pl. XXX figs. 4-6; 1882: 72.
Reniera albescens : Gray, 1867: 518.
Reniera coccinea : Gray, 1867: 518.
Reniera fallaciosa : Gray, 1867: 518.
Reniera fragilis : Gray, 1867: 518.
Reniera lactea : Gray, 1867: 518.
Reniera membrana : Gray, 1867: 518.
Reniera reticulata : Gray, 1867: 518.
Reniera thomasii : Gray, 1867: 518.
Hymeniacidon parfitti n.sp. Parfitt, 1868: 10.
Pellina bibula n.sp. Schmidt, 1870; Schmidt, 1873: 99; Schmidt, 1875.
Amorphina albescens : Schmidt, 1870: 76; Higgin, 1886: 79.
Amorphina coccinea : Schmidt, 1870: 76; Higgin, 1886: 79.
Amorphina fallaciosa : Schmidt, 1870: 76.
Amorphina fragilis : Schmidt, 1870: 76.
Amorphina lactea : Schmidt, 1870: 76.
Amorphina membrana : Schmidt, 1870: 76.
Amorphina reticulata : Schmidt, 1870: 76.
Amorphina thomasii : Schmidt, 1870: 76.
Amorphina panicea : Schmidt, 1870: 77; Schmidt, 1873: 99; Schmidt, 1875; Fristedt, 1885: 25; Higgin, 1886: 78.
Amorphina glabra : Schmidt, 1870: 77.
Hymeniacidon firmus n.sp. Bowerbank, 1874: 186, pl. LXXII figs. 1-2; 1882: 73.
?Halichondria edusa n.sp. Bowerbank, 1874: 201, pl. LXXIII figs 6-9; 1882: 99.
Halichondria ambigua n.sp. Bowerbank, 1874: 213, pl. LXXIV figs. 14-15; 1882: 99.
Hymeniacidon tegeticula n.sp. Bowerbank, 1874: 216, pl. LXXIV figs. 16-17; 1882: 76.
Isodictya incerta n.sp. Bowerbank, 1874: 314, pl. LXXXIX figs. 3-4; 1882: 126.
Amorphina appendiculata n.sp. Schmidt, 1875; Thiele, 1903: 379, pl. 21 fig. 7
Microciona tumulosa n.sp. Bowerbank, 1882: 50, pl. XI figs 1-4.
Hymeniacidon solidus n.sp. Bowerbank, 1882: 76, pl. III figs. 4-7.
Halichondria coralloides n.sp. Bowerbank, 1882: 104, pl. VII figs. 1-3; Arndt, 1935: 102, fig. 217.
Isodictya perplexa n.sp. Bowerbank, 1882: 123, pl. IX figs. 4-6.
Isodictya crassa n.sp. Bowerbank, 1882: 126, pl. VIII figs. 4-6.
Menanetia minchini n.sp. Topsent, 1896
Halichondria bretti : Ferrer-Hernandez, 1922, 1933
Trachyopsilla glaberrima n.sp. Burton, 1931a: 138, figs. 3-4.
Halichondriella corticata n.sp. Burton, 1931b: 137, fig. 2.
Siphonochalina tubulosa : Arndt, 1935: 101.
Halichondria lactea : Arndt, 1935: 103, fig. 219.
Halichondria reticulata : Arndt, 1935: 104, fig. 222
Eumastia appendiculata : Arndt, 1935: 104, fig. 223.
Halichondria topsenti n.sp. De Laubenfels, 1936a; Borojevic et al., 1968: 16; Descatoire, 1969a: 199;
Halichondria membrana : Arndt, 1935: 103, fig. 220; Borojevic et al., 1968: 16.
The following additional synonyms are given by Arndt, 1935:
Spongia urtica
Alcyonium manus diaboli
Alcyonium medullare
Alcyonium paniceum
Alcyonium papillosum
Alcyonium tubulosum
Amorphina grisea
Amorphina paciscens
Amorphina sevosa
Halichondria bibula
Halichondria prostrata
Halina panicea
Halispongia papillaris
Scypha papillaris
Spuma borealis tuberosa
Spuma borealis velamentosa
Suberites firmus