The American Naturalist 



A Monthly Journal, established in 1867, Devoted to the Advancement of the Biological Sciences 

 with Special Reference to the Factors of Organic Evolution and Heredity 



CONTENT8 OF SEPTEMBER NUMBER 



On an Early Tertiary Land-connection between North 

 and South America. Dr. B. F. Scharf. 



Notes on the Relations of the Molluscan Fauna of the 

 Peruvian Zoological Province. Dr. William Hea- 

 let Dall. 



Remarkable Development of Starfishes on the Northwest 

 American Coast : Hybridism ; Multiplicity of Pays: 

 Teratology ; Problems in Evolution ; Geographical 

 Distribution : Professor A. E. Veerill. 



Shorter Articles and Correspondence: Is there a Selec- 

 tive Elimination of Ovaries in the Fruiting of the 

 Leguminos® : Dr. E. Harris. 



Notes and Literature : Ichthyology— Ichthyological Notes, 

 President David Starr Jordan. Parasitology — 

 Professor H. B. Ward. Plant Cytology— The Per- 

 manence of Chromosomes in Plant Cells, Dr. Brad- 

 ley M. Davis. 



CONTENTS OF THE OCTOBER NUMBER 



The Non-muscular Articulations of Crinoids. Austin 

 Hobart Clark. 



On Some Dinichthyid Armor Plates from the Marcellus 

 Shale. Burnett Smith. 



Are Species Realities or Concepts only. Professor J. H. 

 Powers. 



Shorter Articles and Discussion : A Light Weight, Port- 

 able Outfit for the Study and Transportation of Ants. 

 Edith N. Buckingham. Comparison of C»nolestes 

 with Polyprotodonta and Diprotodonta. Pauline 

 H. Dederer. 



Notes and Literature : Comparative Psycholoy — Bohn's 

 " The Birth of Intelligence " : Professor H. S. Jen- 

 nings. Mammalogy — Osgood's Revision of the Mice 

 of the Genus Peromyscus, Dr. J. A. Allen, Leo 

 Errara, Professor Charles E. Bessey. 



CONTENTS OF THE NOVEMBER NUMBER 



The American Toad (Bufo lentiginosus americanus 

 LeConte). Newton Miller. 



Notes on the Behavior of the Domestic Fowl. Philip B. 

 Hadley. 



Vitality of Pine Seeds and the Delayed Opening of Cones. 

 Professor W. C. Coker. 



The Affinities of the Echinoidea. Austin Hobart 

 Clark. 



The Early Breeding Habits of Amblystoma punctatum 



Notes and Literature : Marine Biology — Papers from the 

 Tortugas Laboratory, Professor William E. Bitter. 

 Experimental Evolution — Hiheritance of Color in 

 Pigeons, B. B. Horton. 



C0NTENT8 OFTHE DECEMBER NUMBER 



The Cuticula and Subcuticula of the Trematodes and Ces- 

 todes. Professor Henry S. Pratt. 



The American Toad (Bufo lentiginosus americanus, 

 LeConte). Newton Miller. 



Observations on Copulation among Crawfishes with 

 Special Reference to Sex Eecognition. Dr. A. S. 

 Pearse. 



Shorter Articles and Correspondence : Degeneration ac- 

 companying Inbreeding. Professor C. B. Daven- 

 port. A Note of the Prairie-dog Owl which Be- 

 sembles the Battlesnake's Battle: Dr. J. Arthur 

 Harris. 



Notes and Literature : The Causation of Sex, Professor 

 H. E. Jordan. 



Index to Volume XLHI. 



CONTENT8 OF THE JANUARY NUMBER 



The Eeappearance in the Offspring of artificially pro- 

 duced Parental Modifications. Dr. Francis B. 

 Sumner. 



A Bimodal Variation Polygon in Syndesmon thalictroides 

 and its Morphological Significance. Dr. J. Arthur 

 Harris. 



The Miocene Trees of the Rocky Mountains. Professor 



T. D. A. COCKERELL. 



A Suggestion regarding Heavy and Light Seed Grain. 

 L. R Waldron. 



Notes and Literature : Mammalogy— Nelson's Monograph 

 of the North American Leporidee, Dr. J. A. Allen. 

 Neurology — Edinger's Vorlesungen fiber den Bau der 

 nervosen Centralorgane, Professor G. H. Parker. 



CONTENTS OF THE FEBRUARY NUMBER 



A Mendelian Interpretation of Variation that is Appar- 

 ently Continuous. Professor Edward M. East. 



Color Inheritance in Lychnis dioica L. Dr. George 



Harrison Shull. 

 Is Begeneration a Bepetition of the Ontogenetic and 



Phylogenetic Processes ? Sergius Morgulis. 

 Genetical Studies on Oenothera. Bradley Moore 



Davis. 

 Shorter Articles and Discussion : 



The Mendelian View of Melanin Formation. Dr. 



W. J. Spillman. 



Notes and Literature : Seton's Life History of Northern 

 Animals. Dr. J. A. Allen. Do Parthenogenetic 

 Eggs of Hymen optera Produce only Males. A. 

 Franklin Shull. 



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