NATURAL SCIENCES OF PHILADELPHIA. 41 



intelligence which must have been originated b} T some monkey, 

 since no lower or ancestral t}^pe of Mammals possess the hands 

 necessary for its accomplishment. Whether originated by Jack, 

 or by some ancestor of the forest who used vines for the same 

 purpose, cannot be readily ascertained. 



After a punishment, the animal would only exert himself in 

 this way when not watched ; as soon as an eye was directed to 

 him, he would cease. In this he displayed distrust. He also 

 usually exhibited the disposition to accumulate to be quite su- 

 perior to hunger. Thus he always appropriated all the food with- 

 in reach before beginning to eat. When different pieces were 

 offered to him, he transferred the first to his hind feet to make 

 room for more ; then filled his mouth and hands, and concealed 

 portions behind him. With a large piece in his hands, he would 

 pick the hand of his master clean before using his own, which he 

 was sure of. 



April 16. 

 Mr. Vaux, Vice-President, in the chair. 

 Twenty-three members present. 

 The following paper was presented for publication : 



"Studies of the Tyrannidre. Part I. Revision of the Species of 

 Myiarchus." By Elliott Coues. 



April 23. 



The President, Dr. Ruschenberger, in the chair. 



Tweniy-one members present. 



The following paper was presented for publication: 



" Catalogue and Synonymy of the Family Lucinidre." By Geo. 

 W. Tryon, Jr. 



Prof. P. Frazer, Jr., noticed a granular sediment at the bottom 

 of several bottles of water from the Geyser Spring, Saratoga, 

 and on taking them out they proved to be phanero-crystalline 

 individuals of peculiar form. This form seemed at first sight to 

 be that of the sphenoid or wedge-shaped hemi-pyramids of one of 

 the tetragonal or rhombic systems. On testing the crystals they 

 proved to be nothing else than carbonate of lime, and the diffi- 

 culty lay in making their habitus and composition harmonize. 

 Arragonite crystals they certainly were not, and if they were cal- 

 cites it is evident that they could not be sphenoids. 

 1872.] 4 



