SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



DESCRIPTION OF PLATE 9 



PAGE 



Camasia spongiosa Walcott. (See pi. 12) 1 15 



Fig. I. (Natural size.) View of upper surface, showing the somewhat 

 open cellular structure. U. S. National ^Museum, Cata- 

 logue No. 60700. 

 2. (Natural size.) Vertical view through the specimen repre- 

 sented by fig. I, showing sponge-like growth and the thick- 

 ness of the specimen, which has at its base a thin layer of 

 limestone. 



Newlandia major Walcott 105 



Fig. 3. (Natural size.) Vertical section of a specimen in which the 



lamellae are interrupted in their growth toward the bottom 



and then continue up through to the upper surface of the 



layer. U. S. National Museum, Catalogue No. 60701. • 



The specimens represented by figs. 1-3 are from locality 400c; 



Algonkian: Newland limestone; 8 miles (12.8 km.) west of White 



Sulphur Springs, Meagher County, Montana. 



