Subject ASC0000yyn

The Quarterly journal of the Geological Society of London.
v.37 (1881), Page 114 (1881)
Smithsonian Libraries
BHL Page 43972140

Keywords

fossils ordivician arenig distibution Arenig genera species numbers skiddaw beds Wales hydrozoa rocks From Upper Tremadoc Goegraphical Distribution plantea protozoa hydroza actinoza echinodermata annelida crustacca bryozoa brachiopoda lamellibranchiata gasteropoda pteropoda heteropoda cephalopoda stiperstones Tremadoe Skiddaw beds Stiperstones Llandeilo Caradoc Upper Tremadoc fossils geographical distribution

Contributors

Species