Subject ASC0003t9g

The geological magazine, or, Monthly journal of geology.
Decade 3:v.2 (1885), Page 452 (1885)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32605163

Keywords

Graptolitidae fossil sicula graptolite upper silurian tullb geology shales norway phyllograptus geni Ireland lapworth hall hudson river group canada upper silurian scotland england

Contributors

Species