Chromista Collection

Dictyota dichotoma
Cyanotype photograph by Anna Atkins, one of the first natural history photographers. From British Algae: Cyanotype Impressions, 1853. Date: 1853

Discosphaera tubifera, coccolithophore
Scanning electron microscope (SEM) showing the unicellular planktonic algae Discosphaera tubifera from the North Atlantic surrounded by a sphere of calcite plates - coccoliths

Fucus bulbosus, kelp
Plate 161 from Fuci, or coloured figures and descriptions of the Plants referred by botanists to the genus Fucus (1808-1819), Volume III, by Mary Dawson Turner

Fucus radiatus, kelp

Macrocystis pyrifera, giant kelp
Giant kelp, also known as kelp forest, seaweed and sea grass. Specimen annotated as Macrocystis pirifera from South Africa, held at the Natural History Museum, London

Acanthoica acanthifera, coccosphere
Scanning electron microscope (SEM) image of a coccosphere, collected in the North Atlantic (x 25, 000 on negative). Artificially coloured by computer

Diatoms
Selected slide of a group of fossil diatoms collected from Bori, Hungary in September 1895 and viewed under the light microscipe using differential interfereance contrast

Emiliana huxleyi, coccolith
Scanning electron microscope image of a complete sphere of coccoliths from modern oceans. These are thin calcite shells protecting the coccolithophore within

Emiliania huxleyi coccolithophores collected from a bloom in the SW Approaches to the English Channel in June 2004. Date: 2004

Coccolith
Scanning electron microscope (SEM) image of a Folkestone chalk surface with Cretaceous coccoliths (x2500 on a standard 9 cm wide print)

Syracosphaera anthos
Coccosphere from the Western Mediterranean. False coloured to show the shell is formed of inner and outer layers of coccoliths with very different structure

Scyphosphaera apsteinii. SEM image of an equatorial coccolith

Model of coccolith Kamptnerius magnificus
Copy of the resin model of the coccolith Kamptnerius magnificus Deflandre, 1930 currently on display in the Earth Lab area of the Earth Galleries at the Natural History Museum, London

Ceratolithoides aculeus, coccolith
Scanning electron microscope image of an isolated coocolith from Cretaceous chalk. These are thin calcite shells protecting the coccolithophore within

Chorda filum, sea lace
Cut out of mounted specimen of sea lace or Dead mans rope. A brown seaweed, this specimen is 14.5 feet long and held at the Natural History Museum, London

Florosphaera profunda, coccolith
Scanning electron microscope image of a complete sphere of coccoliths from modern oceans. These are thin calcite shells protecting the coccolithophore within

Nine molluscs, including bivalves and gastropods
Watercolour 391 by the Port Jackson Painter, entitled Kow-er-ring, Kow-ill, Kaa-din, Wal-gan, from the Watling Collection

Emiliania huxleyi coccosphere
Coccosphere of Emiliania huxleyi from the Western Mediterranean. E. huxleyi is one of the most widespread species on earth

Desmarestia ligulata, seaweed
Page 55 from Algae Danmonienses: or dried specimens of Marine Plants, principally collected in Devonshire by Mary Wyatt; carefully named according to Dr. Hookers British Flora

Amphitetras, diatom
Scanning electron microscope (SEM) image showing the diatom Amphitetras with its ornate silica shell (x5000 on a standard 9 cm wide print). Coloured artificially by computer

Ciliate plankton
Scanning electron microscope image of a ciliate showing clearly the microscopic hairs or cilia that they use for movement and feeding (x 700)

Fucus vesiculosis, bladderwrack
Illustration from Botany Library Plate Collection at the Natural History Museum, London. By Leopald Trattinick, 1825

Coccoliths
Scanning electron microscope (SEM) image of coccoliths, these are the limestone scales surrounding the marine phytoplankton coccolithophores

Acanthoica acanthifera

Coccolithus pelagicus
Coccosphere of Coccolithus pelagicus, a common cold water coccolithophore. Collected from the British Continental shelf, North West of Scotland. Specimen diameter 15m. False-coloured SEM image

Florisphaera profunda
A coccolithophore with highly modified, plate-like coccoliths. This is a very common deep dwelleing species, typically living at about 100-150m depth in the water column

Ophiaster formosus
A coccolithophore with long appendages formed of strings of highly modified coccoliths. Collected from the West Pacific. Specimen diameter 50m. False-coloured SEM image

Pontosphaera japonica. A coccolithophore with relatively large, flat, coccoliths. Collected from off Hawaii. Specimen diameter 22m. False-coloured SEM image

Calyptrolithophora papillifera, holococcolith
An SEM of a holococcolith, a nano-fossil, with flat top

Mesogloia multifida, seaweed
Plate 98 from Algae Danmonienses : or dried specimens of Marine Plants, principally collected in Devonshire by Mary Wyatt. Vol. 2 1834-1840

Punctaria plantaginea, seaweed
Plate 206 from Algae Danmonienses : or dried specimens of Marine Plants, principally collected in Devonshire by Mary Wyatt 1834-1840

Chorda lomentaria, seaweed
Plate from Algae Danmonienses: or dried specimens of Marine Plants, principally collected in Devonshire by Mary Wyatt. 1834-1840

Fucus crispus, kelp
Plate 217 from Fuci, or coloured figures and descriptions of the Plants referred by botanists to the genus Fucus (1808-1819), Volume III, by Mary Dawson Turner

Fucus saccatus, kelp
Plate 241 from Fuci, or coloured figures and descriptions of the Plants referred by botanists to the genus Fucus (1808-1819), Volume III, by Mary Dawson Turner

Fucus digitatus, kelp
Plate 162 from Fuci, or coloured figures and descriptions of the Plants referred by botanists to the genus Fucus (1808-1819), Volume III, by Mary Dawson Turner

Chorda filum, seaweed
Herbarium sheet from the collection held at the Natural History Museum, London

Axopodorhabdus albianus, coccolith
Scanning electron microscope image of a Cretaceous coccolith from Folkestone Chalk (x 10, 000 on a standard 9 cm wide print)

Dictyota atomaria, seaweed

Chordaria flagellifornis, seaweed
Plate 57 from Algae Danmonienses : or dried specimens of Marine Plants, principally collected in Devonshire by Mary Wyatt. 1834-1840

Fucus agarum, kelp
Plate 75 from Fuci, or coloured figures and descriptions of the Plants referred by botanists to the genus Fucus (1808-1819), Volume II, by Mary Dawson Turner

Chleophaga hybrida, kelp goose
Ff. 66. Watercolour painting by George Forster annotated Anas ganta Anas antarctica and made during Captain James Cooks second voyage to explore the southern continent (1772-75)

Coccoliths magnified a thousand times
An illustration of Coccoliths magnified a thousand times. Coccoliths are micro-fossils and feature heavily in the composition of chalk

Calcidiscus leptoporus and Syracolithus quadriperforatus, co
In this scanning electron micrograph, the transition of a life-cycle stage in Calcidiscus is shown from the outer cover to the inner layer. Specimen taken from W. Mediterranean

Actinoptychus, diatom
Scanning electron microscope image of the exterior valve of the diatom Actinoptychus (x 500 on a standard 9 cm wide print)

Chalk
A piece of flintless white chalk from the Upper Chalk, Flamborough, Yorks. Chalk is a sedimentary rock formed in deep seas

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