288 



were copies of prehistoric remains: snakes, tortoises, and 

 other bizarre figures, found in Torto Rico. 



He had suggested to Professor Matile that certain dupli- 

 cates in the Poinsett collection might be exchanged for 

 dui)licates in the Princeton collection. Mr. Matile and Mr. 

 Guyot subsequently requested that the Society would con- 

 sider a request for such exchanges; Mr. Matile selected dupli- 

 cates ; and the Secretary displayed s})ecimens of the selection 

 to show in what form the exchanges might be eifected. 



The death of Sir William Jardine, and Dr. John Hughes 

 Bennett, of Edinburgh, members of this Society, was put on 

 record, the Smitbsonian Institution having returned copies 

 of the Proceedings so marked. 



The Committee on Dr. Valentino's Memoir reported that 

 they considered it advisable to return it to the author for 

 certaiu emendations, which, on motion, was so ordered. 



Dr. Genth reported his discovery of a new mineral, the 

 telluride of mercury, in the Keystone Lode, Magnolia Dis- 

 trict, Colorado. Further investigations are in progress and 

 will be reported. The ore contains no silver. Native mer- 

 cury is said to have been noticed in the mine. * 



Pending nominations 804, 805, 806, 807, 808, and new 

 nominations 809, 810, 811, 812, were read. 



Ballots were then cast for Nos. 804 to 808. 



The subject of providing additional conveniences for the 

 members in the rooms of the Society was referred to the 

 Hall Committee with power to act. 



The formal application of Mr. Wooten for the premium of 

 $500 for inventing a successful method of using anthracite 

 slack was referred to the Officers and Council. 



On motion, the subject of exchanges of duplicates with 

 the Princeton Museum was referred to the Curators, with in- 

 structions to report their action at the next meeting. 



Mr. Lesley communicated the fact of experiments being 

 made at Johnstown, by order of the Geological Commission, 

 to obtain some reliable facts about the conduct of mixed an- 



* Dr. Qentb has named tlie new species Coloradoite. 



