Biemma Bowerbank, 1882 accepted as Biemna Gray, 1867 (original description)
Cliona tenebrosus (Bowerbank, 1882) accepted as Cliona celata Grant, 1826 (original description)
Halichondria condensa Bowerbank, 1882 represented as Haliclona (Haliclona) simulans (Johnston, 1842) (original description)
Halichondria coralloides Bowerbank, 1882 represented as Halichondria (Halichondria) panicea (Pallas, 1766) (original description)
Halichondria cylindracea Bowerbank, 1882 represented as Desmacidon fruticosum (Montagu, 1814) (original description)
Halichondria flabellifera Bowerbank, 1882 accepted as Myxilla (Myxilla) rosacea (Lieberkühn, 1859) (original description)
Halichondria foliata Bowerbank, 1874 accepted as Clathria (Clathria) barleei (Bowerbank, 1866) (additional source)
Halichondria robertsoni Bowerbank, 1882 accepted as Myxilla (Myxilla) incrustans (Johnston, 1842) (original description)
Halichondria virgea Bowerbank, 1882 accepted as Myxilla (Myxilla) fimbriata (Bowerbank, 1866) (original description)
Hymedesmia pansa Bowerbank, 1882 represented as Hymedesmia (Hymedesmia) pansa Bowerbank, 1882 (original description)
Hymedesmia peachii Bowerbank, 1882 represented as Hymedesmia (Hymedesmia) peachii Bowerbank, 1882 (original description)
Hymedesmia pilata Bowerbank, 1882 represented as Hymedesmia (Hymedesmia) pilata Bowerbank, 1882 (original description)
Hymedesmia pulchella Bowerbank, 1882 accepted as Hymedesmia (Hymedesmia) pansa Bowerbank, 1882 (original description)
Hymedesmia tenuicula Bowerbank, 1882 accepted as Terpios gelatinosus (Bowerbank, 1866) (original description)
Hymedesmia tenuicula sensu Bowerbank, 1882 accepted as Terpios gelatinosus (Bowerbank, 1866) (original description)
Hymeniacidon armiger Bowerbank, 1882 accepted as Hymedesmia (Hymedesmia) armigera (Bowerbank, 1882) (original description)
Hymeniacidon callosus Bowerbank, 1882 accepted as Ulosa digitata (Schmidt, 1866) (original description)
Hymeniacidon celatus (Grant, 1826) accepted as Cliona celata Grant, 1826 (new combination reference)
Hymeniacidon hillieri Bowerbank, 1882 accepted as Hymeniacidon perlevis (Montagu, 1814) (original description)
Hymeniacidon solidus Bowerbank, 1882 accepted as Halichondria (Halichondria) panicea (Pallas, 1766) (original description)
Hymeniacidon tenebrosus Bowerbank, 1882 accepted as Cliona celata Grant, 1826 (original description)
Hymeniacidon varians Bowerbank, 1882 accepted as Biemna variantia (Bowerbank, 1858) (original description)
Hymeniacidon virgulatus Bowerbank, 1882 accepted as Hymeniacidon perlevis (Montagu, 1814) (original description)
Isodictya bowerbanki Norman in Bowerbank, 1882 accepted as Haliclona (Reniera) cinerea (Grant, 1826) (original description)
Isodictya collina Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) (original description)
Isodictya crassa Bowerbank, 1882 accepted as Halichondria (Halichondria) panicea (Pallas, 1766) (original description)
Isodictya deformis Bowerbank, 1882 accepted as Myxilla (Myxilla) rosacea (Lieberkühn, 1859) (original description)
Isodictya ferula Bowerbank, 1882 accepted as Haliclona (Rhizoniera) rosea (Bowerbank, 1866) (original description)
Isodictya funalis Bowerbank in Jeffreys & Norman, 1875 accepted as Myxilla funalis (Bowerbank in Jeffreys & Norman, 1875) (basis of record)
Isodictya hispida Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) (original description)
Isodictya implicita Bowerbank, 1882 accepted as Iophon hyndmani (Bowerbank, 1858) (original description)
Isodictya inaequalis Bowerbank, 1882 accepted as Myxilla (Myxilla) rosacea (Lieberkühn, 1859) (original description)
Isodictya involuta Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) (original description)
Isodictya nodosa Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) (original description)
Isodictya paupercula Bowerbank, 1882 accepted as Haliclona (Rhizoniera) rosea (Bowerbank, 1866) (original description)
Isodictya perplexa Bowerbank, 1882 accepted as Halichondria (Halichondria) panicea (Pallas, 1766) (original description)
Isodictya pertenuis Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) (original description)
Isodictya scitula Bowerbank, 1882 accepted as Amphilectus fucorum (Esper, 1794) (original description)
Isodictya trunca Bowerbank, 1882 accepted as Haliclona (Rhizoniera) indistincta (Bowerbank, 1866) (original description)
Microciona jecusculum (Bowerbank, 1866) accepted as Hymedesmia (Hymedesmia) jecusculum (Bowerbank, 1866) (additional source)
Microciona simplicissima Norman, 1869 accepted as Bubaris vermiculata (Bowerbank, 1866) (additional source)
Microciona tumulosa Bowerbank, 1882 accepted as Halichondria (Halichondria) panicea (Pallas, 1766) (original description)
Pocillon implicitum (Bowerbank, 1882) accepted as Iophon hyndmani (Bowerbank, 1858) (original description)
Raphiodesma fallaciosum Bowerbank, 1882 accepted as Mycale (Carmia) macilenta (Bowerbank, 1866) (original description)
Raphiodesma intermedium Bowerbank, 1882 accepted as Mycale (Aegogropila) rotalis (Bowerbank, 1874) (original description)

Celtic Seas for Halichondria condensa Bowerbank, 1882 
Celtic Seas for Hymedesmia pansa Bowerbank, 1882 
Celtic Seas for Hymedesmia pilata Bowerbank, 1882 
Celtic Seas for Hymedesmia pulchella Bowerbank, 1882 
Celtic Seas for Hymedesmia tenuicula sensu Bowerbank, 1882 
Celtic Seas for Hymedesmia tenuicula Bowerbank, 1882 
Celtic Seas for Hymeniacidon armiger Bowerbank, 1882 
Celtic Seas for Hymeniacidon callosus Bowerbank, 1882 
Celtic Seas for Hymeniacidon solidus Bowerbank, 1882 
Celtic Seas for Hymeniacidon tenebrosus Bowerbank, 1882 
Celtic Seas for Isodictya bowerbanki Norman in Bowerbank, 1882 
Celtic Seas for Isodictya collina Bowerbank, 1882 
Celtic Seas for Isodictya crassa Bowerbank, 1882 
Celtic Seas for Isodictya ferula Bowerbank, 1882 
Celtic Seas for Isodictya hispida Bowerbank, 1882 
Celtic Seas for Isodictya implicita Bowerbank, 1882 
Celtic Seas for Isodictya involuta Bowerbank, 1882 
Celtic Seas for Isodictya nodosa Bowerbank, 1882 
Celtic Seas for Isodictya paupercula Bowerbank, 1882 
Celtic Seas for Isodictya perplexa Bowerbank, 1882 
Celtic Seas for Isodictya pertenuis Bowerbank, 1882 
Celtic Seas for Isodictya scitula Bowerbank, 1882 
Celtic Seas for Isodictya trunca Bowerbank, 1882 
Celtic Seas for Microciona tumulosa Bowerbank, 1882 
Celtic Seas for Raphiodesma fallaciosum Bowerbank, 1882 
Celtic Seas for Raphiodesma intermedium Bowerbank, 1882 
North Sea for Halichondria coralloides Bowerbank, 1882 
North Sea for Halichondria cylindracea Bowerbank, 1882 
North Sea for Halichondria virgea Bowerbank, 1882 
North Sea for Hymedesmia peachii Bowerbank, 1882 
North Sea for Hymeniacidon virgulatus Bowerbank, 1882 
United Kingdom Exclusive Economic Zone for Hymeniacidon varians Bowerbank, 1882 

Holotype BMNH 1910.1.195, geounit Celtic Seas, identified as Halichondria flabellifera Bowerbank, 1882

 Distribution

 for Halichondria robertsoni Bowerbank, 1882

type-locality: unknown [details]

 Distribution

 for Isodictya inaequalis Bowerbank, 1882

type-locality: unknown [details]

 Synonymy

 for Halichondria flabellifera Bowerbank, 1882

This species was described by Bowerbank from Westport Bay, Ireland, approximate coordinates 53.81°N 9.9°W, depth ... [details]