ACADEMY OF SCIENCES. 179 



self in the desert, about 20 miles north of Mill City, which substan- 

 tiates the belief that at some previous day the water must have 

 stood at a much higher level than now. He also presented the 

 bone of an equida found in the Humboldt river bottom while 

 workmen were excavating for a canal. He stated that he was 

 making endeavors to procure the remainder of the specimen. He 

 also presented several crystals of uncertain species, found by him 

 near Black Rock, Nevada. 



An Indian relic, a stone mortar and pestle, by Dr. Bennet. 

 Professor Davidson said the pestle was the largest he had ever 

 seen, but he had seen larger Indian mortars. 



A letter from George Deitz, of Victoria, was read, and stated 

 that the "bones" supposed to be Virgularia, were taken from a 

 species of fish of the eel order, by fishermen near Burrard's Inlet. 

 The writer said if the Academy desired it, he would forward a spec- 

 imen of the fish itself. 



Professor Davidson read a letter from Dr. A. Gray, the distin- 

 guished botanist, in reply to a letter written by Professor Davidson 

 on behalf of the Academy, for the purpose of inviting the session 

 of 1872 of the American Association for the Advancement of Sci- 

 ence in San Francisco. 



The Association meets next August, in Indianapolis, when the 

 invitation must be made. 



The business Avas on motion referred to the Board of Trustees. 



Professor Davidson made a statement of much scientific interest, 

 embodying the results of his observations regarding the surface 

 geology of the coast as affected by upheavals. He stated that he 

 had found the central position of the upheaval to be somewhere in 

 the vicinity of San Pedro, thence declining rapidly toward San 

 Diego, but slowly northward. He had found four principal terraces, 

 from 20 to 150 feet high, running back to six miles from the 

 present beach. 



Mr. H. G. Hanks made a report that the "desert ship," said to 

 be now on a desert many miles from the ocean, does not prove to 

 be such, and even its close resemblance to a ship did not seem to 

 be admitted. He had received various letters which he would sub- 

 mit to the Academy, but which the writers did not desire should be 

 published. 



