28 



During the past year the following papers have been published 

 by the Assistants in the department : — 



Genesis of the Arietidse, by Alpheus Hyatt, pp. 238, with six Genealogi- 

 cal Tables, fourteen plates and twenty-nine figures in the text. Published 

 jointly by the Smithsonian Institute and the Museum in the " Smithsonian 

 Contributions to Knowledge," No. 673, Washington, 1889, and in the 

 Memoirs of the Museum of Comparative Zoology, Vol. XVL, No. 3. 



Rot in Iris Germanica, by Robert T. Jackson. Garden and Forest, 

 Vol. II. p. 522, 1889. 



Phylogeny of the Pelecypoda, Studies of the Aviculidae and their Allies, 

 by Dr. Robert Tracy Jackson, Memoirs of the Boston Society of Natural 

 History, Vol. IV., No. 8, 1890, pp. 277-400, with fifty-two figures and 

 eight plates. Thesis offered for the Degree of Doctor of Science in Har- 

 vard University, May, 1889. 



