Subject ASC0003yu5
The geologist : a popular monthly magazine of geology.
v.4 (1861), Page 74 (1861)
American Museum of Natural History Library
BHL Page 47658783
Keywords
geology fossil crustacean Skiddaw slates Dithyrocaris branched Graptolites dichotomous worms Skiddow slate graptolite Fossils: crustacean graptolites