382 
INDEX 
Moore, Dwight Munson. “A Botanical Survey of the Campus of 
Denison University’’ 131 
Multipipes — Organ Type 34 
Neuration of the Family Pterophoridae 187 
Niagarian Fossils from Jeptha Knob, Kentucky 105 
“Notes on American Paleozoic Cephalopods.” By Aug. F. Foerste........ 193 
“Notes on Medinan, Niagaran, and Chester Fossils.” By .Aug. F. 
Foerste 37 
“Notes on the Geology of Giles County, Virginia.” By George D. Hub- 
bard and Carey G. Croneis 307 
Occultations, Theory of 128 
Oncoceras 239 
Oncoceras constrictum : 240 
Onychochilus abruptum 104 
Orthis bucheri 109 
dinorthis 91 
euorthis 91 
fissiplicata 92 
Orthoceras 218 
Orthoceras clarksvillense ! 220 
Orygoceras 203 
Oxydiscus youngi 94 
Parastrophia sparsiplicata 93 
Perigrammoceras 224 
Platymerella manniensis 92 
Polyembryony 10 
Poterioceras 254 
Price Sandstone, Giles County, Va 355 
“Primitive Musical Instruments of the Denison Collection.” By Karl 
H. Eschman 28 
Protocycloceras .- 202 
Proetus vaningeni 112 
Pterophoridae, Key to the North American Genera of 192 
Pulaski Shale, Giles County, Va 355 
Restricted Principle of Relativity 269 
Rhynchotreta thebesensis 77 
Rockwood Formation, Giles County, Va 347 
Romney Shale, Giles County, Va 353 
Russell Formation, Giles County, Va. 318 
Sactoceras 227 
St. Clair Limestone of Arkansas, Trilobites from 109 
Schuchertella creditensis 52 
daytonensis 91 
subplana brevior 75 
Secondary Sexual Characteristics and Hormones 14 
Sediments, Cementation of 160 
Compacting of 157 
Induration of 156 
