496 The American Naturalist, ` - [June 
protected, would be an encouragement to original production in the 
arts, as the Academy of Sciences is to those engaged in the p a of 
scientific research. 
—Ture recent celebration at Jena, in commemoration of the sixtieth 
birthday of Professor Ernst Haeckel, was a deserved compliment to 
a great naturalist. The range of Professor Haeckel’s work covers the — 
three fields of usefulness possible to the naturalist, viz.: special work, 
generalization, and popularization. His well known researches on the 
Radiolaria, sponges, corals and Medusæ are monuments of industry 
and skill. His generalization of the phenomena of the earliest embry- 
onic stages is the frame-work of embryology. His speculations as to 
the phylogeny of the Vertebrata have been often confirmed by 
paleontology. His delightful Travels in Ceylon have brought him 
efore a wide and interested public. 
