1854.] 35 



Dr. Leidy read a paper from Mr. J. *\Y. Dawson, of Pictou, N. S., 

 entitled " On Fossil Coniferous wood from Prince Edward's Island ;" 

 which was referred, to Dr. Leidy, Mr. Foulke and JVIr. Isaac Lea. 



Mr. Cassin presented a paper from W. Dudley, Esq., of Madison, 

 "Wisconsin, describing a speeies of Crane found in Wisconsin, and pre- 

 sumed to be new; which was referred to Mr. Cassin, Col. McCall and 

 Dr. Wilson. 



Mr. Cassin also presented two papers from Dr. Alfred T. King, of 

 Greensburg, Pennsylvania, severally entitled "Description of fossil trees 

 found in the Coal Rocks near Greensburg, Pa./' and " Description of a 

 fossil Fruit found in the carboniferous rocks of Beaver Co., Penn. ;" 

 both of which were referred to Mr. Cassin, Mr. Aubrey H. Smith 

 and Dr. Bridges. 



Dr. Leidy exhibited drawings representing lateral and inferior 

 views of the restored skull of Oreodon Culbertsonii, from the Eocene of 

 Nebraska. 



April 18^/j. 

 Wm. Parker Foulke, Esq., in the Chair. 



A letter was read from Dr. Charles Enderlin, of New York, dated 

 31st March, 1851, acknowledging the receipt of his notice of election 

 as a Correspondent. 



A letter was also read from the Lyceum of Nat. History of New York, 

 dated April 4th, 1854, acknowledging the receipt of late Nos. of the 

 Proceedings. 



Mr. Cassin presented a paper for publication in the Proceedings, en- 

 titled "Notes on Birds observed in Texas, and in the States of Xeuva 

 Leon, Tamaulipas and Coahuila, Mexico, with descriptions of new species; 

 by D. N. Couch, U. S. Army." Referred to Dr. Le Conte, Mr. Cassin 

 and Col. McCall. 



Dr. Leidy exhibited a specimen of the restored upper jaw of the 

 Titanotherium Proutii, of Nebraska. 



April 25th. 



Vice-President Bridges in the Chair. 



The Committees to which were referred papers, read April 4th by Dr- 

 Le Conte and Prof. S. F. Baird ; April 11th, by Mr. J. W. Dawson, of 

 Pictou, N. S. ; by Mr. Wm. Dudley, of Madison, Wisconsin ; by Dr. 

 Alfred T. King, of Greensburg, Pennsylvania; April 18th, by Lieut. D. 

 N. Couch, U. S. A., severally reported in favor of publication in the 

 Proceedings. 



Synopsis of the species of Platynus and allied genera, inhabiting the United 



States. 



By John L. Le Conte, M. D. 



The species of the small group of Carabica, herein examined, are quite fre- 

 quently so closely related, as to be with difficulty separated ; some synonymy 

 too has been produced by the want of sufficient bibliographical knowledge on the 

 part of those who have investigated these genera. To lessen in some degree 



