SUBJECT AND AUTHOR INDEX 
VOLUME XX 
“A Botanical Survey of the Campus of Denison University,” By 
Dwight Munson Moore 131 
Amphicyrtoceras 255 
Amphicyrtoceras laterale 257 
orcas 255 
tantalum ^ 259 
“A Report on the Theory of Relativity. (Einstein Theory).” By Paul 
Biefeld 269 
“A Review of the Biology of Sex-Determination.” By Sidney I. Korn- 
hauser ^ 1 
Ascoceras 216 
Bays Sandstone, Giles County, Va * 343 
Bellerophon centervillensis 78 
Beloitoceras 244 
Beloitoceras lycum 251 
pandion 245 
plebeium 247 
Biefeld, Paul. “A Report on the Theory of Relativity. (Einstein 
Theory)” 269 
“The Occultation of Venus by the Moon on January 13, 1923” 127 
Billingsites 217 
Billingsites (?) williamsportensis 217 
Bluefield Shale, Giles County, Va 357 
Brachyprion sp 75 
Bfassfield Limestone of Ohio, Brachiopoda of 88 
Buthotrephis 68 
Buthotrephis creditensis 70 
Calymene Ill 
Calymene altirostris 110 
cf. cedarvillensis 108 
Cameroceras 212 
Cameroceras calumettense 215 
trentonense 213 
Capillary action 161 
Charactoceras 234 
Charactoceras baeri 235 
Chester Formation of Illinois, A Stigmarian Root from the 116 
379 
