Species attributed to Pollock (1998) are those that were reported as occurring between Cape Cod and Newfoundland (but not necessarily in the ocean waters surrounding Mount Desert Island). If they were not reported by Procter (1933), they need further examination and potential removal from this checklist.
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| Class | Order | Family | Genus | Specific Epithet | authority | common name | Sources (full citations given after this table) |
| Demospongiae | Hadromerida | Clionidae | Cliona | celata | Grant | sulfur sponge | Procter (1933, p. 114.), Pollock (1998) |
| Demospongiae | Hadromerida | Polymastiidae | Polymastia | robusta | Bowerbank | ? | Procter (1933, p. 110.) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | concinnus | Lambe | ? | Procter (1933, p. 109.) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | ficus | (Johnston) | fig sponge | Pollock (1998) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | hispidus | (Johnston) | ? | Procter (1933, p. 106.), Pollock (1998) |
| Demospongiae | Hadromerida | Suberitidae | Suberites | montalbidus | (Johnston) | ? | Procter (1933, p. 108.) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | bowerbanki | Burton | yellow sun sponge | Pollock (1998) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | fibrosa | Fristedt | ? | Procter (1933, p. 87.) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | genitrix | Schmidt | ? | Procter (1933, p. 87.) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | panicea | (Pallas) | crumb-of-bread sponge | Procter (1933, p. 86.), Pollock (1998) |
| Demospongiae | Halichondrida | Halichondriidae | Halichondria | sitiens | Schmidt | ? | Procter (1933, p. 88., as Eumastia sitiens) |
| Demospongiae | Halichondrida | Halichondriidae | Hymeniacidon | heliophila | (Parker) | ? | Procter (1933, p. 102., as Stylotella simplissima) |
| Demospongiae | Poecilosclerida | Acarnidae | Iophon | pattersoni | (Bowerbank) | ? | Procter (1933, p. 104., as Iophon chelifer) |
| Demospongiae | Poecilosclerida | Isodictyidae | Isodictya | deichmannae | (de Laubenfels) | ? | Pollock (1998) |
| Demospongiae | Poecilosclerida | Isodictyidae | Isodictya | palmata | (Ellis & Solander) | palmate sponge | Procter (1933, p. 101., as Homoeodictya palmata), Pollock (1998) |
| Demospongiae | Poecilosclerida | Isodictyidae | Neoesperiopsis | digitata | (Miklucho-maclay) | ? | Procter (1933, p. 94., as Esperiopsis quatsinoensis) |
| Demospongiae | Poecilosclerida | Myxillidae | Myxilla | incrustans | (Esper) | ? | Procter (1933, p. 99.), Pollock (1998) |
| Demospongiae | Poecilosclerida | Myxillidae | Myxilla | fimbriata | (Bowerbank) | ? | Procter (1933, p. 100.) |
| Demospongiae | Poecilosclerida | Microcionidae | Microciona | prolifera | (Ellis & Solander) | red beard sponge | Procter (1933, p. 104.), Pollock (1998) |
| Demospongiae | Poecilosclerida | Mycalidae | Mycale | lingua | (Bowerbank) | ? | Procter (1933, p. 97.) |
| Demospongiae | Poecilosclerida | Mycalidae | Mycale | ovulum | (Schmidt) | ? | Procter (1933, p. 98.) |
| Demospongiae | Poecilosclerida | Tedaniidae | Tedania | suctoria | (Schmidt) | ? | Procter (1933, p. 101.) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | oculata | (Pallas) | finger sponge | Pollock (1998) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | permollis | (Bowerbank) | purple sponge | Pollock (1998) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | ecbasis | de Laubenfels | ? | Procter (1933, p. 88., as Reniera cinerea) |
| Demospongiae | Haplosclerida | Chalinidae | Haliclona | rosea | (Bowerbank) | ? | Procter (1933, p. 89., as Reniera heterofibrosa) |
| Demospongiae | Haplosclerida | Chalinidae | Reniera | ventrilabrum | Fristedt | ? | Procter (1933, p. 90.) |
| Demospongiae | Haplosclerida | Chalinidae | Reniera | urceolus | (Rathke and Vahl) | ? | Procter (1933, p. 93.) |
| Demospongiae | Haplosclerida | Chalinidae | Chalina | oculata | (Pallas) | mermaid's glove | Procter (1933, p. 93.) |
| Calcarea | Leucosolenida | Sycettidae | Scypha | ciliata | (Fabricius) | little vase sponge | Pollock (1998) |
| Calcarea | Leucosolenida | Leucosoleniidae | Leucoselenia | botryoides | (Ellis & Solander) | organ-pipe sponge | Pollock (1998) |