156 SMITHSONIAN MISCELLANEOUS COLLECTIONS . VOL. 64 



DESCRIPTION OF PLATE 23 



PAGE 



Gallatinia pertexa Walcott 116 



Fig. I. (Natural size.) View of upper surface of type specimen. U. S. 

 National Museum, Catalogue No. 60730. 

 2. (Natural size.) Vertical section through specimen repre- 

 sented by fig. I. 



The specimen illustrated is from locality 400J: Algonkian : Belt 

 terrane ; north of Bartons Bridge on the Gallatin River, Montana. 



