418 The Philippine Journal of Science 
ACKNOWLEDGEMENTS 
My grateful acknowledgements and thanks are here made 
for constant direction and many valuable suggestions from Prof. 
Charles F. Baker, for the translation of Blanco’s descriptions by 
Mr. Inocencio Elayda, for the translation of Schumann’s descrip- 
tions by Prof. Charles S. Banks, for the furnishing of material 
and data by Dr. F. W. Foxworthy and many friends and fellow 
students, and finally for general suggestions by Mr. E. D. Merrill. 
