X PROCEEDINGS OF THE NATIONAL MUSEUM vol. 78 



Restudy of Some Burgess Shale Fossils 



By George Evelyn Hutchinson 



Facing pag« 

 1 . Aysheaia pedunculata and Opahinia regalis 24 



Notes on the Types of American Two-winged Flies of the 

 Genus Sarcophaga and a Few Related Forms, Described by 

 THE Early Authors 



By J. M. Aldrich 

 1-3. Genitalia of flies of the genus Sarcophaga 40 



Exploration of Ruins in the White Mountain Apache Indian 

 Reservation, Arizona 



By Walter Hough 



1-6. White Mountain Apache Indian Reservation 20 



7. Hafted stone blade from the Cliff House, White Mountain Apache 



Indian Reservation 20 



8. White Mountain Apache Indian Reservation 20 



9. Soapstone pipe from White Mountain Apache Indian Reservation 20 



10. White Mountain Apache Indian Reservation 20 



Report on the South American Sea Stars Collected by 

 Waldo L. Schmitt 



By W. K. Fisher 



1-2, Ophidiaster agassizii 10 



3. Patiria chilensis 10 



4. Patiriella calcarata 10 



5. Patiriella fimhriata 10 



6-7. Anasterias minuta 10 



8. Anasterias 10 



MOLLUSKS from THE AsPEN ShALE (CrETACBOUS) OF SOUTH- 

 WESTERN Wyoming 



By John B. Reeside, jr., and A. Allen Weymouth 

 1-4. MoUusks from the Aspen shale 24 



Description of a New Species of Amidostomine Worm op the 

 Genus Epomidiostomum from the Gizzard op Anserine Birds 



By Rudolf Wetzel 

 1-2. Epomidiostomum crami a,nd Epomidiostomum uncinatum 10 



