Subject ASC0001169
The Quarterly journal of the Geological Society of London.
v.56 (1900), Page 480 (1900)
Smithsonian Libraries
BHL Page 41487836
Keywords
theca spines graptolite fauna thecae wood monograptus crinitus drawing of graptolite thecae Lower Winnington Lande Lond Mountain enlargement extremeity distal thecae fossil long mountain monograptus botany Monograptus crinitus