VI CONTENTS 



Number 16. 



Page 

 Art. XIX. — Minor Faulting in the Cayuga Lake Region ; 



by E. T. Long 229 



Art. XX. — Description of a new Species of Fossil Herring, 



Quisque bakeri, from the Texas Miocene ; by D. S. Jordan, 249 

 Art. XXI.— A New Genus of Fossil Fruit ; by E. W. Berry, 251 

 Art. XXII. — The Relations Between the Purcell Range and 



the Rocky Mountains in British Columbia, Canada; by 



L. D. Burling, 254 



Art. XXIII. — Some Complnx Chlorides containing Gold. I. 



Pollard's Ammonium-Silver-Auric Chloride; by H. L. 



Wells, 257 



Art. XXIV. — Studies in the Cyperaceae; by Theo. Holm, 260 

 Art. XXV. — Collophane, a Much Neglected Mineral; by 



A. F. Rogers, 269 



Art. XXVI. — A New Genus of Oligocene Hyajnodontida? ; by 



M. R. Thorpe, 277 



Art. XXVII.— The Status of Homogalax, with Two New 



Species; by E. L. Troxell, 288 



Art. XXVIII. — ATantalate and Some Columbites fom Custer 



County, South Dakota; by W. I*. Headden, 293 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — The Separation of the Isotopes of Mercury, G. von 

 Hevesy: The Color of Ferric Ammonium Alum, J. Bonnell and E. P. 

 PamviAN, 300. — The Persulphides of Hydrogen, J. H. Walton and L. B. 

 Parton: A Separation of Germanium from Arsenic, J. H. Muller, 301. 

 — Asymmetry of the Gaseous Molecule, R. Gans, 302. — L'Atome, Dr. 

 Achalme: Calculus and Graphs, L. M. Passano: The Manufacture of 

 Optical Glass and of Optical Systems, F. E. Wright, 303. 



Geology. — Notes on Artie Ordovician and Silurian Cephalopods, A. F. Foerste, 

 304. — Stratigraphy of the Pennsylvanian Formations of North-Central 

 Texas, F. B. Plummer and R. C. Moore: Recent Mollusca of the Gulf of 

 Mexico and Pleistocene and Pliocene Species from the Gulf States: Hand- 

 buch der Relionalen Geologie: The Topographic and Geological Survey of 

 Pennsylvania, G. H. Ashley, 305. — United States Bureau of Mines, H. F. 

 Bain, 306. — Metamorphism in Meteorites, 307. 



Miscellaneous Scientific Intelligence. — Carnegie Institution of Washington Year 

 Book, No. 20, 1921, 307.— Proceedings of the First Pan-Pacific Scientific 

 Conference: A Laboratory Manual for Comparative Vertebrate Anatomy, 

 309. — The Vitamins: Publications of British Museum of Natural History, 

 London, 1921, 310. — Register zum Zoologischer Anzeiger: George Weber's 

 Lehr- und Handbuch der Weltgeschichte, 311. — Observatory Publications: 

 Tables and other Data for Engineers and other Business Men: Bibliotheca 

 Zoologica II: Mentally Deficient Children, Treatment and Training, 312. 



Obituary. — J. C. Branner: J. F. Bottomley: M. Verworn: G. L. Cimician: 

 B. W. McFarland: C. W. Waidner, 314. 



