INDEX OF AUTHORS. 183 



RIGGS, H. C. 



On Pascal's Limacon and the Cardioid, i, 89. 



Bibliography, viii A, 157. 



ROGERS, A. F. 



Cuprogoslarite — a New Variety of Zinc Sulphate, viii A, 105. 



New and Little Known Pelecypods from the Coal Measures (with J. W. Beede), 



viii A, 131. 

 Normal Ankerite from Phelps County, Missouri, viii A, 183. 

 A New Genus and Species of Bryozoans from the Coal Measures of Kansas and 



Missouri, ix A, 1. 

 Annotated list of Minerals Occurring in the Joplin Lead and Zinc District, ix A, 



161. 

 Occurrence of the Bryozoan Genus liliahdomeson in America, ix A, 173. 

 Coal Measure Faunal Studies, I (with J. W. Beede), ix A, 233. 

 Bibliography, viii A, 157. 

 Bibliography, continued, x, A 156. 



ROUSE, J. E. 

 The Visual Perception of Distance, v A, 109. 

 Bibliography, x A, 156. 



SELLARDS, E. H. 



Notes on the Permian Flora of Kansas, ix A, 63. 

 A New Genus of Ferns from the Permian of Kansas, ix A, 179. 

 Permian Plants — T(eniopteris of the Permian in Kansas, x A, 1. 

 Bibliography, x A, 157. 



SHUTT, C. E. 



Experiments in Judging the Distance of Sound, vii A, 1. 



Experiments in Judging the Distance of Sounds (with L. D. Ikenberry), vii A, 9. 



SNOW, Martha B. 

 The Servant-girl Problem, iv, 31. 

 Bibliography, x A, 158. 



SNOW, W. A. 



Notes and Descriptions of Syrphida% i, 33. 



Descriptions of North American Trypetidje, with Notes, part I, ii, 159. 



American Platypezidte, I, iii, 143. 



Cnephalid and its Allies, iii, 177. 



A New Species of Pelccoecra, iii, 187. 



American Platypezidte, II, iii, 205. 



Diptera of Colorado and New Mexico, iii, 525. 



Supplementary List of North American Syrphidaj, iii, 219. 



On Toxotrupana of Gerstaecker, iv, 117. 



List of Asiiidie, Supplementary to Osten Sacken's Catalogue of North American 



Diptera, 1878-'95, iv, 173. 

 Bibliography, viii A, 167. 



STEVENS, W. C. 

 Notes on Some Diseases of Grass, i, 123. 

 On the Behavior of Kinoplaem and Nucleolus in the Division of the Pollen Mother 



CqWb oi A>iclppi(is cornuti, vii A, 77. 

 Apparatus to Facilitate the Process of Fixing and Hardening Material, vii A, 



107. 

 Bibliography, viii A, 167. 



