Subject ASC0003t7w
The geological magazine, or, Monthly journal of geology.
Decade 3:v.2 (1885), Page 449 (1885)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32605160
Keywords
Dichograptus octobrachiatus hall galgenberg christiana hydroid polyp graptolites original Phyllograptus-shales