352 RECORDS. 



the heart after the atrophy of the pronephros and the associated 

 veins. 



Mr. Bigelow briefly described some observations on eggs of 

 the crustacean Hippolyte subjected to sHght pressure during 

 cleavage. While the normal cleavage is total, pressure pro- 

 hibited the formation of cell-boundaries, and unsegmented eggs 

 with 2, 4, 8, 1 6 and 32 nuclei were obtained. When the pres- 

 sure was removed the cell-boundaries soon appeared. The 

 cleavage of this ^^^ under pressure exhibits some striking 

 resemblances to the normal superficial cleavage of eggs of allies. 



Professor Lloyd described the conditions for botanical research 

 at the Desert Botanical Laboratoiy in Arizonia. Many photo- 

 graphs were exhibited to illustrate descriptions of the peculiar 

 flora in the vicinity of the laboratory and of the method of con- 

 ducting experiments, especially those concerned with the rela- 

 tion of desert plants to water. 



Dr. W. M. Wheeler, of the American Museum of Natural 



History, was elected chairman, and M. A. Bigelow, of Teachers 



College, Columbia University, secretary of the section for the 



year 1905. 



M. A. Bigelow, 



Secretary. 



SECTION OF GEOLOGY AND MINERALOGY. 

 November 21, 1904. 



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

 siding. 



The minutes of the last meeting of Section were read and 

 approved. 



The following program was then offered : 



Summary of Papers. 



John J. Stevenson, The Island of Spitzbergen and Its 

 Coal. 



James F. Kemp, The Titaniferous Magnetite in 

 Wyoming. 



