136 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



in an old synclinal fold, remnants of Silurian and Devonian formations have 

 been preserved. These formations and their faunas will be briefly described, 

 and specimens from the Lower and Middle Devonian will be exhibited. 



At 12.30 the Society adjourned for luncheon, meeting again at 2 p. m., 

 with Dr. E. T. Jackson presiding. The papers on General and Inverte- 

 brate Paleontology were then continued, the first paper being presented 

 by the author and illustrated with specimens and a demonstration; 10 

 minutes. 



MOUNTING OF ROCK AND F088IL SPECIMENS WITH SULPHUR 

 BY CHESTER A. BEEDS 



(Ahstract) 



During the year sulphur has been used in mounting rocks and fossils for 

 exhibition purposes in the American Museum of Natural History. The method 

 consists of applying a small amount of molten sulphur to the back of the 

 specimen and inserting a modified paper-fastener. To place the specimen on 

 exhibition, a tablet is selected through which a hole can be bored. The shanks 

 of the fastener are then pushed through and the protruding ends bent down. 

 Both the liquid and the viscous states of molten sulphur have been used. 

 Specimens varying in weight from a few ounces to more than eight pounds 

 have been mounted in this manner and have been kept in an upright position 

 in an exhibition case for several months without apparent change. 



The following paper was presented without manuscript and illustrated 

 with lantern slides; 15 minutes. Discussed by C. A. Eeeds, with reply 

 by the author. 



RESTORATION OF PALEOZOIC CEPHALOPODS 

 BY RUDOLPH EUEDEMANN 



On account of the shortness of time still remaining, the author com- 

 bined the next two papers, presenting them without manuscript and illus- 

 trating them with charts ; 20 minutes. Discussed by Charles Schuchert, 

 L. D. Burling, R. S. Bassler, and Rudolph Ruedemann, with replies by 

 the author. 



SOME NEW PALEOGEOQRAPHIC MAPS OF NORTH AMERICA 

 BY A. W. GBABAU 



{Al)str(ict) 



A number of paleogeographic maps of North America will be shown and the 

 basis on which they are constructed will be explained. Since they differ, as 



