Hemichordata Collection

Cephalodiscus species
Plate 5 from British Antarctic Expedition 1910 -13 (Terra Nova): Zoology. Vol. IV, (1918) NO. 2. Cephalodiscus. By W. G. Ridewood, D.Sc. Pp. 11-82 : 12 textfigures, 5 plates and a map. 1918, 4to

Enteropneust worm / Acorn worm (Yoda purpurata) from the North Atlantic Ocean, southern Purple variety, feeds on sea floor sediment leaving behind variable wavy traces, Depth approx 2700m

Didymograptus, graptolite fossil C016 / 4848
Didymograptus, graptolite fossil. Graptolites are an extinct group of marine, colonial animals. Known for their tuning-fork shape, they formed part of ancient plankton

Cyrtograptus, graptolite
Colony of the graptolite Cyrtograptus from the Silurian of Bohemia. Field of view 5 cm wide

Didymograptus, fossil graptolite
The two tuning-fork graptolite on this piece of Welsh Ordovician shale belong to the genus Didymograptus and have branches some some 5 cm in length with sawtooth-like thecae

Didymograptus murchisoni, graptolite
This is an Ordovician tuning-fork shaped graptolite from Wales. Graptolites are an extict group of marine, colonial animals

Monograptus, graptolite
Shown here is Monograptus, a slender and delicate Silurian graptolite. Graptolites are the fossil remains of small colonial animals. Graptolite colonies were connected together by living tissue

Dictyonema retiforme, grapolite
Fossil grapolite from the Early Silurian (425 million years old), Ontario, Canada. On display in the From the Beginning, Gallery 63, Earth Galleries at the Natural History Museum, London

Dictyonema flabelliforme, gaptolite
Shown here is an Ordovician dendroid graptolite, specimen originates from North Wales. Graptolites are the fossil remains of small colonial marine animals

Didymograptus, graptolite
Didymograptus, Ordovician tuning-fork planktonic graptolites. Graptolites are an extinct group of marine, colonial animals

Dictyonema, graptolite
Shown here is Dictyonema, a Cambrian dendroid graptolite. Graptolites are the fossil remains of small colonial animals. Graptolite colonies were connected together by living tissue

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