Series. 
Author. 
Subject. 
LIBRARY CATALOGUE SLIPS. 
United States. Department of the interior. (U.S. geological survey.) 
Department of the interior | — | Monographs | of the | United 
States geological survey | Volume XXX | [Seal of the depart- 
ment] | Washington | government printing office | 1898 
Second title: United States geological survey | Charles D. 
Walcott, director | — | Fossil medusx | by | Charles Doolittle 
Walcott | [Vignette] | 
Washington | government printing office | 1898 
4°. ix,201 pp. 47 pl. 
Walcott (Charles Doolittle). 
United States geological survey | Charles D. Walcott, di- 
rector | — | Fossil medusw | by | Charles Doolittle Waleott | 
[Vignette] | : 
Washington | government printing office | 1898 
4°. ix, 201 pp. 47 pl. 
(Unirep STatEes. Department of the interior. (U. S. geological survey.) 
Monograph XXX.} 
United States geological survey | Charles D. Walcott, di- 
rector | —| Fossil meduse | by | Charles Doolittle Walcott | 
[Vignette] | 
Washington | government printing office | 1898 
4°, ix,201 pp. 47 pl. 
[Unitep SravrEs. Department of the interior. (U. S. geological survey.) 
Monograph XXX.] 
