D. Appleton & Oompamy's Publications. 



Dr. Fritz Muller, an eminent German naturalist, has sub- 

 jected Darwin's doctrines to a critical test in their application 

 to the development of the Crustacea. In his German work 

 upon the subject, Avhich bears so powerfully in favor of the new 

 views that it has been republished in England under the sug- 

 gestive title of " Facts for Darwin," Dr. Mliller says : " A false 

 supposition, when the consequences proceeding from it are fol- 

 lowed further and further, will sooner or later tend to absurdi- 

 ties and palpable contradictions. During the period of tor- 

 menting doubt — and this was by no means a short one — when 

 the pointer of the scale oscillated before me in perfect uncer- 

 tainty between the pro and the con, and when any fact tending 

 to a quick decision would have been most welcome to me, I 

 took no small pains to detect some such contradictions among 

 the inferences, as to the class of Crustacea, furnished by the 

 Darwinian theory. But I found none either then or subse- 

 quently. Those which I thought I had found were dispelled 

 on closer consideration, or eventually became converted into 

 supports for Darwin's theory," 



Another example. In 1859, Prof. Gegenbauer published 

 the " Outlines of Comparative Anatomy," which has been 

 adopted as an authoritative text-book of the subject. He has 

 this year issued a second and much enlarged edition, recast, 

 and embodying the Darwinian philosophy. He speaks of the 

 theory of descent with modification, through natural selection, 

 as constituting a more important era in comparative anatomy 

 than any other theory has ever yet done ; and he regards com- 

 parative anatomy itself as one of the touchstones of its truth. 

 Dr. Gegenbauer closes his sketch of the theories of the subject 

 with the following words : " If we consider that the number 

 of those who have mastered the theory and its real meanings 

 and bearing is, though at present small, yet constantly increas- 

 ing, and that, too, by accessions from the ranks of its former 

 opponents, we begin to feel ourselves justified in looking for 

 the accomplishment of an auspicious revolution by its means." 



