92 The American Naturalist. [January, 



the degeneracy of the scapular and pelvic arches in the Lacertilia; 

 E. B. Wilson, The relation between bilateral symmetry and the cleav- 

 age of the ovum ; H. F. Osborn, The dentition of Palseonictis, Am- 

 blyctonus and Oxysenas ; J. P. McMurrich, On the early development 

 of the marine Isopod Jsera ; G. Baur, On variation in the genus Tro- 

 pidurus ; C. W. Stiles, On Spiroptera scutata Muller : H. F. Osborn, 

 The Evolution of the mammalian molars to and from the tritubercu- 

 Iate type ; H. B. Ward, Some notes on Nectonema. 



The officers for the current year are : President, Professor C. 0. 

 Whitman ; Vice-President, Professor H. F. Osborn ; Secretary-Treas- 

 urer, Professor J. P. McMurrich ; Members, with the preceding, of the 

 Executive Committee, Professors E. L. Mark and T. H. Morgan. 



The Indiana Academy of Science held its seventh annual 

 session in the capitol at Indianapolis, December 30 and 31, 1891. The 

 president of this meeting was Prof. O. P. Hay, Butler University, Irving- 

 ton, Ind. The unusual number of 98 papers were entered, requiring 

 the Academy to meet, except Wednesday morning and night, in two 

 sections ; one devoted to Zoology, Botany and Geology, the other to 

 Physics, Mathematics and Chemistry. Wednesday night President 

 Hay delivered the customary address on "The present state of the 

 Theory of Organic Evolution." The officers for next year are as 

 follows : 



President, J. L. Campbell, Crawfordsville, Ind. 

 Vice-Presidents, J. C. Arthur, Lafayette, Ind., W. A. Noyes ( 

 Terre Haute, Ind. 



Secretary, A. W. Butler, Brook ville, Ind. 

 Treasurer, C. A. Waldo, Greencastle, Ind. 



Auditors, P. S. Baker, Greencastle, Ind. W. W. Norman, Green- 

 castle, Ind. 



Curators : — 



Botany, J. M. Coulter, 

 Ichthyology, C H. Eigenmann, 

 Geology, S. S. Gorby, 

 Ornithology, A. W. Butler, 

 Herpetology, O. P. Hay. 

 Entomology, F. M. Webster, 

 Mammalogy, E. R. Quick. 

 The summer meeting of the Academy will be held by invitation of 

 the faculty of Earlham College, at Richmond, Ind., in May next. At 

 the same time and place will be held the meeting of the Mathematical 



