14 Bashford Dean Memorial Volume 



including A. S. Woodward's "Catalogue of Fossil Fishes in the British Museum" (1896), 

 Carman's memoir on "The Cyprinodonts" {l895),Baskett's "Story of the Fishes" (1899), 

 Max Weber's "Siboga Expedition to the Malay Archipelago" (1902), O. P. Hay's 

 "Bibhography and Catalogue of the Fossil Vertebrata of North America" (1902), Tra- 

 quair's "The Lower Devonian Fishes of Cemiinden," T. H. Morgan's "Evolution and 

 Adaptation," C. R. Eastman's papers on the kinship of the arthrodires (1907), Vernon L. 

 Kellogg's "Darwinism Today" (1908), Gaskell's "The Origin of the Vertebrates" (1909). 

 For his efforts towards advancing the memorial to Lamarck (1744-1829), the renowned 

 naturalist of France, he was awarded the Lamarck Medal and was made a ChevaHer of 

 the Legion of Honor in 1910. 



PAPERS ON THE BROADER PROBLEMS OF EVOLUTION 

 Beginning in 1902 



These reviews above mentioned, besides containing many penetrating observations 

 on the immediate subject, also include passages that summari2;e Dean's views on the 

 broader problems of evolution. While ever cautious and conservative about rising too 

 rapidly to higher philosophy, Dean was rarely content with mere descriptive labors and 

 as the years passed he began to formulate and express his general views on evolution. 

 But it is riot until 1902 that we find him issuing brief notices dealing especially with these 

 broader aspects. 



Here may be listed the following titles, which indicate sufficiently the general trend 

 of his thoughts: "A Case of Mimicry Outmimicked?" (1902); "Albinism, Partial 

 Albinism, and Polychromism in Hagfishes" (1903); Review of T. H. Morgan's "Evolu' 

 tion and Adaptation" (1904); "Evolution in a Determinate Line as Illustrated by the 

 Egg'cases of Chimaeroid Fishes" (1904); "When Do Variations Attain Selective Value" 

 (1908); "Accidental Resemblances among Animals. A Chapter in Unnatural History." 

 The latter paper cited a number of quite surprisingly close but accidental resemblances 

 between widely different parts of organic forms, such as the "Samurai's face" on the back 

 of a certain species of Japanese crab. If, argued Dean, such resemblances may come into 

 being without having any value in terms of Natural Selection, should we not be cautious 

 in invoking Natural Selection to account for similar resemblances, as of butterflies to 

 leaves, which may conceivably be equally fortuitous and valueless? Later papers of this 

 series include "A New Example of Determinate Evolution" (1909), and "The Plan of 

 Development in Series of Forms of Known Descent in its Bearing upon the Doctrine of 

 Preformation," (1909). 



In general it may be said that in Dean evolution found an historian of judicial temper 

 whose prime motive was the establishment of the facts of the case, and to whom simple 

 general explanations were regarded with some misgivings. As the greater part of his 

 zoological research was accomplished before 1905, he was scarcely vexed with the com' 

 plexities of the mechanism of heredity revealed by contemporary genetics. Even so his 

 knowledge of the ways of embryologic development in its relation to phylogeny was 

 notably broad and well founded. 



