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 Munsteria hcessii F.-Ooster ( non Sternberg), the 
Swiss Eocene species mentioned under the generic description, Mye- 
lofhycus 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. Dali. 
