Smithsonian Report, 1905. — Gastine. 



Plate IV. 



Zoological and Paleontological Applications of the Radiograph, Made by 

 m. g. contremoulins. 



1. Head of Parroquct. 



2. Head of petit ronyeur (note details of teeth in the maxillaries). 



3. Head of eanard. 



4-7. Fossil shells show the internal eonstruetion without destroying? the specimen. 



