Callithamnion pluma [&] D[itt]o repens

Callithamnion rothii [&] D[itt]o floridulum

Polysiphonia obscura

Callithamnion purpurascens

Calothrix Cresswelliae [= Calothrix Creswellii]

Conferva Brownii

Callithamnion secundatum / (on porphyra)

Bulbochaete setigera

Callithamnion sphaerospermum

Callithamnion Borreri [= Callithamnion borreri]

Sphaeroplea punctalis

Conferva flaccida

Ectocarpus amphibius

Ceramium fastigiatum

Draparnaldia elongata

Schizonema Smithii, torquata [= Schizonema smithii var. torquatum]

Callithamnion byssoides

Callithamnion floccosum

Schizonema Wyattiæ

Vaucheria marina

Conferva glomerata

Codium bursa

Conferva ericetorum

Conferva arenosa / this conferva, a few years ago / covered whole areas in Oxfordshire / and Berkshire

Padina pavonia