670 



THE AMERICAN NATURALIST \you XLI 



The Secretary of the Universidad Nacional de Buenos Aires sent to 

 the congress numerous photographs of its zoological gardens. 



Professor W. B. Scott of Princeton University exhibited Vols. 1, 4, 5, 

 and 8 of the Reports of the Princeton University Expeditions to Pata- 

 gonia. These volumes, which are all that are now published, are 

 devoted to the general narrative, botany, and paleontology. The 

 entire work is expected to require fifteen volumes, and the expense of 

 publication is met by the "J. P. Morgan Publication Fund." The 

 narrative is said to compare in interest with Darwin's account of the 

 voyage of the Beagle, and it may be printed in brief form for more 

 general distribution. 



Dr. H. Przil)iaiii of the University of Vienna showed copies of his 

 Einleitmui in dlr < xprrim, ntrllr Morphohgie der Tiere published by 

 F. Deuticke, Lcii)zig und \\ ieii, 1904, and the Experimental-Zoologie, 

 1, Emhryogenese, published by the same firm in 1907. 



Dr. M. C. Piepers sent to the congress a copy of his book Noch 

 einmal, Mimicry, Selektion, Darwinismus, published by E. J. Brill, 

 Leiden, 1907. His earlier publication upon the same subject contained 

 the theses which he presented to the Fifth International Zoological 

 Congress, at Berlin, 1901. 



Variation and Mendelism.— Professor W. Bateson of the University 

 of Cambridge, England, whose address on "Facts limiting the theory 

 of heredity" was of unusual interest, showed the great variation 

 occurring in (crtain moths, aiul the results of cross-breeding in pigeons, 

 poultry, and corn. Since this exhibit was not unpacked until the close 

 of thecongr(^ss, it could not re.vive the attention which it merited. 



Professor T. Dwiyht of the Harvard Medical School invited the 

 congress to inspect liis very fine collection of variations in human 

 bones, displayed in the ^\an•eu ]^Iuseinn. 



Professor W. E. Castle of Harvard Univrsity exliil)it<.l liv(> rabbits, 

 guinea pigs, and rats, showing in a most (>lfective way several forms 



breeding experiments are still beiuL;; conducted on an extensive scale. 



for black, or.e for vellow. aii<l a third for barvini: (which causes the 

 black ami y<-llow to !„■ di.po.cd in l.,-,nds upon ih.- itulividual hairs). 

 The various know., c.lnr varieties i-c.ult fi-om th<- loss ..r m.ulification 

 of one or n.on- of thc.>e th.ve ..nit.. The inheritance i. Me...leliau. 

 The unit con.position of en<-h know,, colo,- vari.-ty was explai.uMl and 



