146 ALASKA GEOLOGY 



but when the latter are cut away the walls of the vertically sectioned 

 cones present a pinnate arrangement. The texture of the fossils, of 

 whose organic nature we are thoroughly satisfied, is coarser and their 

 color lighter than that of the black slate in which they are embedded. 



Compared with Miinsteria hcessii F.-Ooster (non Sternberg), the 

 Swiss Eocene species mentioned under the generic description, Mye- 

 lophycus curvatum is distinguished by its larger size and smaller in- 

 ternal cones. 



Locality. Woody Island, Kadiak, on the shore facing Chiniak 

 Bay, Alaska. The same slab contains the types of Inoceramya con- 

 centrica. 



Collector. W. H. Dall. 



