Coe — A Century of Zoology in America. 371 



given in full. The titles are here in many cases abbre- 

 viated and the subjects consolidated. 



General views on Classification, 1, 286, 1846. 



Zoophytes, 2, 64, 187, 1846 ; 3, 1, 160, 337, 1847. 



Genus Astraea, 9, 295, 1850. 



Conspectus crustaceorum, 8, 276, 424, 1849 ; 9, 129, 1850 ; 11, 

 268, 1851. 



Genera of Gammaracea, 8, 135, 1849 ; of Cyclopacea, 1, 225, 

 1846. 



Markings of Carapax of Crabs, 11, 95, 1851. 



Classification of Crustacea, 11, 223, 425; 12, 121, 238, 1851; 

 13, 119; 14, 297, 1852; 22, 14, 1856. 



Geographical distribution of Crustacea, 18, 314, 1854; 19, 6; 

 20, 168, 349, 1855. 



Alternation of Generations in Plants and Radiata, 10, 341, 

 1850. 



Parthenogenesis, 24, 399, 1857. 



On Species, 24, 305, 1857. 



Classification of Mammals, 35, 65, 1863 ; 37, 157, 1864. 



Cephalization, 22, 14, 1856 ; 36, 1, 321, 440, 1863 ; 37, 10, 157, 

 184, 1864; 41, 163, 1866; 12, 245, 1876. 



Homologies of insectean and crustacean tvpes, 36, 233, 1863 ; 

 47, 325, 1894. 



Origin of life, 41, 389, 1866. 



Eelations of death to life in nature, 34, 316, 1862. 



Of the above, the articles on cephalization as a funda- 

 mental principle in the development of the system of 

 animal life have attracted much attention. The evidence 

 from comparative anatomy, paleontology, and embry- 

 ology alike supports the view that advance in the 

 ontogenetic as well as in the phylogenetic stages is cor- 

 related with the unequal growth of the cephalic region as 

 compared with the rest of the body. Dana shows that 

 this principle holds good for all groups of animals. His 

 homologies of the limbs of arthropods and vertebrates, 

 however, do not accord with more modern views. 



Other papers on the same and allied topics were pub- 

 lished by Dana in other periodicals. His most conspicu- 

 ous zoological works, however, are his reports on the 

 Zoophytes and Crustacea of the United States Explor- 

 ing Expedition, 1837-1842. The former consists of 741 

 quarto pages and 61 folio plates, describing over 200 new 

 species, while the Crustacea report, in two volumes, has 

 1620 pages and 96 folio plates, with descriptions of about 

 500 new species. Each of these remains to-day as the 



