GEORGE LEFEVRE AND W. C. CURTIS 



Zoological Department, University of Missouri 



Reproduction and parasitism in the Unionidse. Five plates and one figure. 

 EDWIN LINTON 



Washington and Jefferson College 



On a new rhabdocoele commensal with Modiolus plicatulus. Forty-one 



figures. 



J. PLAYFAIR McMURRICH 

 The University of Toronto 



The genus Arachnactis. Five figures. 

 S. O. MAST 



Woman's College, Baltimore 



Reactions of Amoeba to light. Two figures. 

 MAYNARD M. METCALF 



Zoological Department, Oberlin College 



Studies on Amoeba. I. On the localization of the excretory function 



in Amoeba proteus. Forty-four figures. 

 T. H. MORGAN 



Zoological Department, Columbia University 



Studies on eggs subjected to centrifugal force. Twenty-one figures, 



three plates in color and five plates gelatine process. 

 HENRY F. NACHTRIEB 



Biological Department, University of Minnesota 



The primitive pores of Polyodon spathula (Walbaum). Twelve figures. 

 HENRY LESLIE OSBORN 

 Hamline University 



On the structure of cryptogonimus (nov.gen.) chyli (n.sp.) an aberrant 



distome, from fishes of Michigan and New York. Seven figures. 

 G. C. PRICE 



Zoological Department, Leland Stanford Jr. University 



The structure and function of the adult head kidney of Bdellostoma 



Stouti. Four figures. 

 A. M. REESE 



West Virginia University 



The lateral line system of Chimaera colliei. Eighteen figures. 

 SAMUEL RITTENHOUSE 



Biological Department, Olivet College 



The embryology of Stomotoca apicata. Thirty-two figures. 

 DAVID H. TENNENT 

 Bryn Mawr College 



Variation in echinoid plutei. Twenty-one figures and nine charts. 

 ALBERT H. TUTTLE 



Department of Biology, University of Virginia 

 Mitosis in (Edogonium. Eighteen figures. 

 EDMUND B. WILSON 



Zoological Department, Columbia University 

 Studies on chromosomes. Five figures. 

 H. V. WILSON 



Zoological Department, University of North Carolina 



A study of some epithelioid membranes in monaxonid sponges. Twenty- 

 one figures. 



Biographical sketch with three Heliotype portraits. 

 THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 

 36TH STREET AND WOODLAND AVENUE, 

 PHILADELPHIA, PA. 



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