CONTENTS. 



Page 

 Louis Valentine Pirsson (with Portrait) 173 



Art. XIV. — Origin of Rock Tanks and Charcos ; by K. Bryan 188 



Art. XV. — Xew Species of Oligocene (White River) Felidae; 



by M. R. Thorpe = 207 



Art. XVI. — Some Minerals of the Melanterite and Chalcan- 

 thite Groups with optical data on the hydrous sulphates 

 of manganese and cobalt; by E. S. Larsen and M. L. 

 Glenn 225 



Art. XVII. — An Upper Carboniferous Footprint from Attle- 



boro, Massachusetts; by R. S. Lull 234 



SCIENTIFIC INTELLIGENCE. 



Geology— Topographic Maps and Sketch Mapping, J. K. Finch : The Porto 

 Eico Earthquake of 1918 ; Report of the Earthquake Investigation Com- 

 mission, H. F. Eeid and S. Taber, 238.— Scientific Survey of Porto Rico 

 and the Virgin Islands : La Fauna Jurdssica de Vinales, M. S. Roig : Mary- 

 land Geological Survey, Cambrian and Ordovician, R. S. Bassler, 237. — 

 Handbuch der Palaeogeographie, T. Arldt : The Geology of East Texas, 

 E. T. Dumble : Pleistocene Marine Submergence of the Hudson, Champ- 

 lain and St. Lawrence Valleys. H. L. Fairchild : Report of the State 

 Geologist on the Mineral Industries'" and Geology of Vermont, 1917-1918, 

 G. H. Perkins, et al., 238. — Geology and Natural Resources of Rutherford 

 Count}*, Tennessee, J. J. Galloway : Geologic Map of Ohio, J. A. Bow- 

 nocker: Seasonal Deposition in Aqueo-glacial Sediments. R. W. Satles : 

 Middle Cambrian Algae and Middle Cambrian Spongiee, C. D. Walcott. 

 239. — On the Structure of Eusthenopteron, AV. L. Bryant : Upper Cre : 

 taceous Floras of the eastern Gulf Region in Tennessee, Mississippi, 

 Alabama, and Georgia, E. W. Berry : Some American Jurassic Ammon- 

 ites of the Genera Quenstedticeras, Cardioceras. and Amceboceras, 

 Family Cardioceratidae, J. B. Reeside, Jr., 240.— Paleontological Cor- 

 relation of the Fredericksburg and Washita Formations in North Texas, 

 W. S. Adkins and W. M. Minton : Fossils from the Miura Peninsula and 

 its immediate north, M. Vokoyama : North American Early Tertiary 

 Bryozoa, F. Canu and R. S. Bassler, 241. — A Monograph of the Naiades 

 of Pennsylvania. Part III, Svstematic Account of the Genera and Species, 

 A. K. Ortmaxn, 242. 



