PROCEEDINGS 



OF THE 



ACADEMY OF NATURAL SCIENCES 



OP 



PHILADELPHIA. 



1884. 



January 1, 1884. 



The President, Dr. Leidy, in the chair. 



Fourteen persons present. 



Ant infected with a Fungus. — Prof. Leidy exhibited an ant, 

 Camponotus pennfiyJvanicus, which was rigid, with limbs and 

 antennae extended, as in life, in which condition it was found 

 under the bark of a decaying tree. It was infected with a fungus 

 which spread through everj- part of the body. 



Cassiterite from Black Hills, Dakota. — Prof. Leidy exhibited 

 specimens of tin ore submitted for examination by Mr. Eltonhead, 

 who reports them to have been obtained at Black Hills, Dakota. 

 They consisted of a mass of granite containing cassiterite, a 

 fragment of quartz with the same, and a mass of pure cassiterite 

 of about one pound weight. Prof. Leidy said he had also seen 

 several pounds of large grains obtained from gold washings. 

 From among these he had picked out several characteristic 

 crystals. 



January 8. 

 Mr. Geo. Y. Shoemaker in the chair. 

 Ten persons present. 



A paper entitled " Some Phenomena in the Life-History of 

 Clathrulina elegans," by Miss S. G. Foulke, was presented for 

 publication. 

 3 



