112 GEOLOGY—INFUSORIA. 
amination of these discs, however, I have proved them to belong to the genus Stephanodiscus, 
and have found the crown of thorns preserved on some specimens, although they are commonly 
broken off. The principal forms I have noticed in this specimen are— 
Galleinella (Fig. 7, a, b) forms chief portion of the mass. 
Galleinella varians. D 
Stephanodiscus—perhaps new. 
Pennularia nobilis, Ehr. 
Pennularia viridis. 
Epithemia, as in No. 1, but comparatively rare. 
Surirella splendida (? Ehr.) in fragments. 
Pollen of pine. 
Spongiolites, which are also present in No. 1. 
There are many other fresh-water forms in both specimens, but I have not had time to study 
them satisfactorily. 
Yours, very truly, 
J. W. BAILEY. 
Lieut. BECKWITH. 
