Subject ASC000137e
The Quarterly journal of the Geological Society of London.
v.50 (1894), Page 427 (1894)
Smithsonian Libraries
BHL Page 39089211
Keywords
trilobite fossils fossil section longitudinal section legs limbs lobes Calymene senaria Walcott Apus spitzbergensis Lepidurus spitzbergensis Bernard enrolled Calymene ventral surface Fossil trilobyte calymene senaria lepidurus calymene