1 1 1 6 The American Naturalist. rDecember, 
Microscopy: Thoma' 8 Camera Lucida {Illustrated) 81— The Egg of Petro- 
myzon, 188— Central Nervous System of Lumbricus, 189— Zylol Dam- 
mar, 190— The Culture of Infusoria, 277— The Retina of the Bird, Big- 
Cell Division, 519— Demonstration of the Tonoplast, 619— The Preserva- 
tion of Actiniae, 519— The Preparation of Bone and Teeth with their Soft 
Parts, 520— Kultschitzky's Methods of Staining the Central Nervous 
System, 744— A Simple Method for Removing the Gelatinous Layer from 
the Batrachian Egg, 745— The Differentiator Modified, from Report Read 
before the British Association, Sept. 11, 1889, at Newcastle Eng., 745— 
On a Method of Preparing Bkstoderms of the Fowl 839 
Scientific News. 88, 188, 282, 461, 553, 748, 1037, 1109 
is or Scientific Societies America 
, 86— Biological Society of Washington, 87,' 189, 
Science Association of Staten Island, 189, 457, 546, 1032— The Indiana 
Academy of Science, 190— United States National Academy of Sciences, 
280— Boston Society of Natural History, 281, 544— Philadelphia Acad- 
emy of Natural Sciences, 640— Wichita Academy of Science, 546— The 
Kent Scientific Institute, Grand Kapids, Mich., 546— Chicago Academy 
of Sciences, 546 — American Association for the Advancement of Science, 
