The American Naturalist 



A Monthly Journal, e.tabluhed in 1867, Devoted to the Advancement of Ae^Biotogical Science. 



CONTENT8 OF THE APRIL NUMBER 



AlpheusHyatt *£d his^ Principles of Research. Dr. 



Bearing of Teratological Development in Nicotiana 



on Theories of Heredity. Orland E. White. 

 Shorter Article^and ^^lion^^redtty in a Par- 



HtoSaywx |*f^^i^omOTph8 C °°A id h" 

 Hybrids!! nt br.^ n F* U (^k^%rdovician (?) 

 Fish Remains in Colorado. Professor T. D. A. 

 Cockerell. 



Notes a ^* 1 J^f|2i ol Sg y Re ar n Boy L B Mood£ 



CONTENT8 OF THE MAY NUMBER 



liu^al^ingdom. Professor H. 8. Jennings. 



CONTENTS OF THE JUNE NUMBER 



of Mutations in Somatic Cells. Professor R. 

 V Nofes^d^Uerature : Valuation of the Bea. 

 Professor Chas. C. Adams. 



CONTENTS OF THE JULY NUMBER 



Hadley. „„<„_. -rh* Geologic Work 

 Shorter Articles and Discussion. The oeoiog^ 



of Termites in the Belgian Congo. Donald Steel. 

 Notes and Literature : Work in Genetic ^J 1 ™'^ 



Notes' on TcMhyology^President David Starr 



CONTENT8 OF THE AUGUST NUMBER 



Cambrian Holothurians. Austin H. Clark. 

 Shorter Articles and Discussion: Viability and Coup- 

 ". . ' I „ »..: . ^ a 



CONTENTS OF THE SEPTEMBER NUMB ^ ll0 



Genetical Studies on Oenothera. IV. Brsdle. 



Sing le Number 40 Ceat. Yearly ***** 



The NATURALIST wiU b« —l 1. ww «b«a«. for four moo*, for On. D°"" 



THE SCIENCE PRESS 



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