RECORDS. 333 



conjugating gametes and exactly analogous to the formation of 

 gametes in allied rhizopods such as Polystomdla, Ceiitropyxis^ 

 and CJilamydopJivys as recently worked out by Schaudinn, 

 Lantern slides were used for illustrations. 



Professor Wilson' Ssubject w^as "The Cleavage-Mosaic in 

 Patella ; with remarks on the Mosaic-Theory of Development." 

 This paper will soon be published in full in the Journal of Ex- 

 perimental Zoology. 



Professor MacDougal gave a short talk on the topography, 

 water-fall, drainage, botanical and zoological conditions in a 

 local desert in Lower California. Gary N. Calkins, 



Acting Secretary. 



SECTION OF GEOLOGY AND MINERALOGY. 



April i8, 1904. 



Section met at 8:15 P. M., Professor James F.Kemp, pre- 

 siding. 



The minutes of the last meeting of the Section were read 

 and approved. 



The following program was then offered : 



Arthur HoUick, A Canoe Trip Down the Yukon River 

 FROM Dawson to Anvik. 



Edmund Otis Hovey, The Grand Soufriere of Guada- 

 LOUPE, AN Analogue of Mont Pele. 



Summary of Papers. 



Dr. Hollick said in brief: The trip was made under instruc- 

 tions from the United States Geological Survey, with the special 

 object of collecting pala^obotanical material, from which to de- 

 termine the age of certain exposures in central Alaska. 



The party consisted of Dr. Hollick, Mr. Sidney Paige, field 

 assistant, and Mr. John Rentfro, cook and general camp 

 assistant. The start was made from Seattle, Wash., on June 

 I, 1903, by steamer to Skagway, Alaska, where they arrived on 



