CONTENTS 



Proceedings of the Elisha Mitchell Scientific Society, 



February, 1921, to May, 1921 1 



Proceedings of the Twentieth Annual Meeting of the 



North Carolina Academy of Science 6 



John Francis Lanneau, 1836-1921 17 



The Age of Insects. Z. P. Metcalf 19 



The Genus Raspailia and the Independent Variability of 



Diagnostic Features. H. Y. Wilson 54 



An Interesting Maximal Case. Archibald Henderson and 



H. G. Baity 61 



Key to the Butterflies of North Carolina. C. S. Brimley . . 73 



A Theorem on Double Points in Involution. J. W. Lasley, Jr. 80 

 The Collybias of North Carolina. W. S. Coker and H. C. 



Beardslee 83 



Abstracts and Reviews 108 



Isotopes. Francis P. V enable 115 



Some Considerations in Defense of the General Biology , 



Course. J. P. Givler 123 



Notes on the Oecology and Life-History of the Texas 



Horned Lizard, Phrynosoma Cornutum. J. P. Givler .... 130 



A Magnetite-Marble Ore at Lansing, N. C. W. 8. Bayley .... 138 

 A Botanical Bonanza in Tuscaloosa County, Alabama. 



Roland M. Harper 153 



Fishes in Relation to Mosquito Control. Samuel F. 



Hildehrand 161 



Notes on the Morphology and Systematic Relationship 



OF Sclerotium Rolfsii Sacc. B. B. Higgins 167 



An Interesting Anomaly in the Pulmonary Veins of Man. 



W. C. George 173 



The Eastern Shrubby Species of Robinia. W. W. Ashe 175 



A New Oak from the Gulf States. W. D. Sterrett 178 



A New Genus of Water Mold Related to Blastocladia. 



W. C. Coker and F. A. Grant 180 



Forest Types of the Appalachians and White Mountains. 



W. W. Ashe 183 



Index to Volumes 32-37 200 



