Prof. Ernst HaecM. 27 



by Haeckel. This last naturalist, besides his great -work, 

 Generalle Morphologie (186G), has recently (1868, with a 

 second edition, 1870) published his Natural History of Cre- 

 ation, in wliich he fully discusses the genealogy of man. If 

 this work had appeared before my essay had been written, I 

 should probably never have completed it. Almost all the 

 conclusions at which I have arrived I find confirmed by this 

 naturalist, whose knowledge on many points is much fuller 

 than mine." 



Yfhen we consider from whom these words come, they are 

 the highest encomium a work of that kind could receive. 



In 1869 Prof. Haeckel published an essay upon the evo- 

 lution of the Siphonoj)horeSy which was awarded a gold medal 

 at Utrecht. 



In 1870 he published biological studies on the Monera 

 and Protista of the Catallacts, a new group of Protista. 



In 1871 he spent March and April on the Dalmatian 

 coast near Trieste, and August and tSej)tember on the coasts 

 of Norway, in scientific researches. 



In 1872 he visited the eastern coasts of the Mediterranean 

 for similar purposes. During these three years he delivered 

 courses of lectures at Jena and Berlin, and published arti- 

 cles on the division of labor in nature and in human life ; 

 also on life at great sea depths, on the genealogical tree of 

 the human race, and on the relationship of the sponges and 

 corals. 



In 1872 appeared auotlier of his great works — viz., The 

 Calcareous Sponges, in three volumes, with sixty plates. 

 This, like his Morphology, is an epoch-making work. It 

 answered the demand of those who insisted upon " actual 

 facts " as the only proofs of evolution by showing the his- 

 tory, connection, and descent of the species of sponges in 

 such masterly detail that ignorance of the work was the 

 only escape from conviction. "With its publication evolu- 

 tion was generally admitted to have passed from tlic stiige 

 of hypothesis and to stand forever as a verified law of biol- 

 ogy — its fundamental law. 



In 1874 he published essays upon the Castra?a, or stom- 

 ach, theory ; The Phylogenic Classification of Animals ; 

 and the Homology of Germ-layers of Aninuils. All these 

 werQ preparatory to the great work which follcnvcd. 



In 1874-'75 appeared his celebrated Anthropogenic, or 

 Evolution of Alan. This is a popular exposition of the ori- 

 gin and evolution of man as a race (phylogenic), and of 



