CONTENTS IX 



Tage 



Register of the California meeting, 1921 190 



Proceedings of the Thirteenth Annual Meeting of the Paleontological So- 

 ciety, held at Amherst, Massachusetts, December 28-30, 1921; R. S. 



Bassler, Secretary 191 



Session of Wednesday, December 28 193 



Session of Thursday, December 29 193 



Report of the Council 193 



Secretary's report 193 



Treasurer's report 194 



Appointment of Auditing Committee 195 



Election of officers and members '. 195 



New nominations and election to membership 196 



Presentation of papers 196 



Nature of Balterelld [abstract] ; by Thomas H. Clark 196 



Possible habits of cephalopods and trilobites [abstract] ; by 



Percy E. Raymond 197 



Historical sketch of paleopathology [abstract] ; by Roy L. 



Moodie 197 



Oldhamia in the Lower Cambrian of Massachusetts [ab- 

 stract] ; by B. F. Howell 198 



Nature of Taonurus and its use in estimating geologic time 



[abstract] ; by J. J. Galloway 199 



Pennsylvania faunas of north Texas and their correlation 



[abstract] ; by Raymond C. Moore 199 



Unattached simple Paleozoic corals [abstract] ; by August F. 



Foerste 201 



Devonian limestone at Saint George, Quebec [abstract] ; by 



Thomas H. Clark 201 



Age of the coal beds of the Kaiping coal basin, in northeast- 

 ern China [abstract] ; by A. W. Grabau 201 



Ordovicic formation of north China [abstract] ; by A. W. 



Grabau 202 



Presidential address 203 



Some problems connected with the Dakota sandstone : Presi- 

 dential address by T. W. Stanton 203 



Supplement to the bibliography and catalogue of the fossil 



vertebrates of North America ; by O. P. Hay 203 



Flora of the Payette formation [abstract] ; by Ralph W. 



Chaney 203 



Flora of the Rancho La Brea [abstract] ; by Ralph W. 



Chaney 204 



Pines of the Mesozoic and their relationship to older and 



more modern types [abstract] ; by Edward C. Jeffrey. . . . 204 

 Ordovician "Hypoparian" genera of trilobites [abstract] ; by 



E. O. Ulrich 205 



Limits of variations in foraminif era ; by J. A. Cushman 206 



Recent geological work in Gulf Coast oil fields; by E. T. 

 Dumble 207 



