886 The American Naturalist. [October, 
McDonald; April 22, The Nicaragua Canal, Hon. Warner Miller or 
Civil Engineer A. G. Menocal, U. S. N.; April 29, Compensation of 
the Compass on Board Iron Ships, Lieut. S. W. B. Diehl, U.S. N.; 
Various Theories of Terrestrial Magnetism, Prof. Cleveland Abbe; 
May 6, Mesopotamia, Rev. Prof. John P. Peters; May 13, The Gates 
and Straits of Europe and Africa, Mr. Talcott Williams. 
The Biological Society of Washington, D. C.—May 14— 
The following communications were read: The Photogenic Organs of 
Fireflies, Prof. W. H. Seamen; A New Prairie Dog From Mexico, 
Dr. C. Hart Merriam; Where Salt-water Fishes Hide: Results of 
Deep-water Seining, Mr. Charles Hallock; Additions to the Flora of 
Washington, with exhibition of specimens, Mr. Theo. Holm; The Use 
of Certain Terms in Geographic Distribution, Mr. Frederick V. 
Coville. 
May 28.—Communications: On the Superfamily Chatodontoidea, 
Dr. Theo. Gill; Coon Cave, Missouri, Dr. C. Hart Merriam. 
June 11—The Southern Fur Seal (Arctocephalus) at Guadalupe 
Island, Dr. C. Hart Merriam; Uses of Plants Among the Panamint 
Indians, Mr. Frederick V. Coville; On Amarantus crassipes Schlec- 
tendal, Mr. J. M. Holzinger; The Death Valley Expedition—lantern 
illustrations, Dr. C. Hart Merriam. 
Freperic A. Lucas, Sec. 
SCIENTIFIC NEWS. 
Dr. Carl Berg has been appointed Director of the Museo Publico of 
Bueno Aires as successor to the late Prof. Hermann Burmeister. 
Recent Deaths.—Dr. Veit Graber, Prof. of Zoology at Czerno- ` 
witz, well known for his work upon Hexapod Embryology, at Rome, 
March 3, 1892, on a journey to Naples, aged 48 years. Dr. Carl 
August Dohrn, the President of the Stettin Entomological Society and 
father of Dr. Anton Dohrn, May 4, 1892, aged 86 years. Riccardo 
Canestrini, at Padua December 22, 1891, aged 34 years; he was a 
student of the mites. l 
