Subject ASC000115v
The Quarterly journal of the Geological Society of London.
v.56 (1900), Page 617 (1900)
Smithsonian Libraries
BHL Page 41488003
Keywords
fossil eye trilobite compound eye insect dalmania nobilis Dalmania nobilis casts internal enlarged external surfaces hexagon honeycomb structure lenses truncated cone Grindrod collection Wenlock shales Builth Brecknockshire