92 
Psyche 
[March 
Acknowledgements 
Our field research was partially supported by Canadian National 
Research Council grants to both of us, and a Geological Society of 
America grant to JK-P. Olga and Hana Kukal and Bob Peck 
worked long and hard in an excavation. Dr. Barry Kues generous- 
ly gave his time and loaned specimens from Carrizo Arroyo. Dr. 
Sergius H. Mamay, Dr. Stuart A. Northrop, Mr. T. J. Kinney and 
Mr. Ed. Kinney are thanked for graciously providing information 
on geology and localities. Karel and Anna Havlata have given their 
time and energy in continuing to work on the Obora locality in 
Czechoslovakia, and found the material described here. Drs. Ken- 
neth Hooper and John Moore, Department of Geology, Carleton 
University, have helped with research space and encouragement. 
We are very obliged to Professor Frank M. Carpenter (Harvard 
University, Cambridge, Mass.) for reading the manuscript. 
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