كتب ذات صلة

The ventriculidae of the chalk: their microscopic structure, affinities and classification.

A Middle Devonian octactinellid sponge from New York

Fossil sponge spicules from the upper chalk found in the interior of a single flint-stone from Horstead in Norfolk

Fossil sponge spicules from the upper chalk found in the interior of a single flint-stone from Horstead in Norfolk

• Palæontology of New-York
  المؤلفون: Hall, James ,  Simpson, George B.
• Palæontology of New-York ...
  المؤلفون: Hall, James ,  Simpson, George B.
• Palæontology of New-York ...
  المؤلفون: Hall, James ,  Simpson, George B.