1851.] 205 



Mr. Isaac Lea stated that he had visited within a few days, the 

 locality whence Dr. J. Y. Schelley had procured the reptilian fossil. 

 It was a calcareous conglomerate, the rock being in place and forming 

 a wall on the side of the road, and was not a boulder as had been sup- 

 posed. No further traces of bones had since been discovered. Mr. Lea 

 exhibited a specimen of the rock, and stated that he had now deter- 

 mined to name the fossil C'lepsysaurvs pennsylvanicus, from the pecu- 

 liar form of the vertebra, which resembled an hour glass in shape. 



On leave granted, Mr. Vaux moved that Mr. Pearsall be added to 

 the Committee appointed to select a member to prepare a biographical 

 memoir of the late Dr. Morton. Adopted. 



On motion of Mr. Vaux, it was also resolved that a committee of five 

 be appointed to select a suitable design for a tablet to the memory of 

 Dr. Morton, to be placed in the Hall, and to carry out the resolution 

 relating to this subject, adopted at the meeting of the Society held on 

 the 16th inst. Committee, Mr. Vaux, Dr. Bridges, Mr. Wetherill, Dr. 

 Meigs, Mr. Phillips. On motion of Dr, Leidy, the Curators were 

 added to the Committee. 



May 21th. 

 Vice-President Wetherill in the Chair. 



The Library Committee, to whom was referred the communication 

 from the Historical Society of Pennsylvania, requesting the deposit with 

 them of the Paris Moniteur belonging to the Academy, reported " that 

 as said papers constitute part of a series in connection with the docu- 

 mentary History of the French Revolution, it would be inexpedient to 

 separate them, and they would therefore respectfully decline comply- 

 ing with the request of the Historical Society." Adopted. 



Dr. Fisher, from the Committee on the subject, reported that Dr. 

 Charles D. Meigs had been unanimously chosen by the Committee to 

 prepare a biographical memoir of Dr. Morton, and that Dr. Meigs had 

 accepted the appointment. 



The Committee to whom was referred the following paper by Dr. 

 Leidy, reported in favor of publication in the Proceedings. 



Contributions to Helminthology. 

 By Joseph Leidy, M. D. 

 AscARis, Lin7i. 



1. AscARis ALiENATA. Rud. Entoz, Syn. p. 661; Dujardin Hist. Nat. des Htl- 

 miTith. p. 158. 



Body nearly uniformly cylindrical, white ; mouth prominent, with the three 

 lips prominent and very distinct : no membranous or other appendages. 



Female. Body cylindrical to within four lines of the moulh, when it gradually 

 becomes narrowed ; posteriorly straight, abruptly narrowed into a very small ob- 



