Smithsonian Report, 1916.— Bartsch. 



Plate 1. 



Nautiloids. 



l.Thoracoceras corbulatvm (Banandc) 2. SphyradocerasoptatumBaTTande. 3. Ophidioceras simplex 

 mrrande. 4. Endoceras timidum Barrande. 5. Hercoceras mirum Barraude. 6. Lituitcs Utum 

 Monti. 



