$4.6<) per Year (Foreign). 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 



DEVOTED TO THE NATURAL SCIENCES 



IN THEIR WIDEST SENSE. 



MARCH, 1896. 



CONTENTS. 



The Constancy of Racteri 



Fore Milk. //. L. B, 



Life Before Fossils. Cka 



XXIX.) G. S. Mead. . 



Editor's Table.— A National I 

 X rays (I. 



"•-.: -'■.;. • - .._ . iV 



Exploration.— The Huxley Memorial. . . S 

 Recent Literature — Williams's Manual of 

 Lithology — The Corundum Deposits of 

 Georgia— Bailey's Plant Breeding .- . .' 2 

 Recent Books an 

 General Notes. 



Petrography -The En 



Rocks from Easte: 



\ Basic Rock de- 



togy- — The Myxospori 

 i of the Hexapod ] 



L«on T and P SeW 



. 



• 



• New F,-rms. . : 

 ophilid;.- De- 

 lory of Scale . 



:.— The development of Isopods. • : 



jy.— Mercer's Cave Explorations 



PHILADELPHIA, U. S. A. 



THE EDWARDS & DOCKER CO., 



.520 MINOR STREET. 



