MODES OF INHERITANCE IN TELEOST HYBRIDS 



H. H. NEWMAN 



From the Hull Zoological Laboratory, University of Chicago, and the Marine 

 Biological Laboratory, Woods Hole 



THIRTY-EIGHT FIGURES 



CONTENTS 



Introduction 447 



Historical review of the work of Appellof, Moenkhaus, Kammerer, Bancroft 



and Newman on teleost hybrids 448 



New experiments: Reciprocal crosses between species of the genus Fundulus 



and the genus Cyprinodon 457 



1. Material and methods 457 



2. Tabulation of data 459 



3. Summary arid discussion of data 467 



Inheritance of pigment characters in Fundulus hybrids 475 



1. A statement concerning pigment characters in Fundulus species 475 



2. Tabulations of data 478- 



3. Summary and discussion of data on pigment inheritance 482 



General summary of conclusions 486 



1. The nature of the influence of foreign spermatozoon on cleavage and 



early development 486 



2. Harmful versus beneficial effects of foreign spermatozoon 487 



3. Phylogenetic relationship of parent species and success in development 



of hybrids. . 487 



4. Modes of inheritance in teleost hybrids and the Mendelian hypotheses 



of dominance and segregation 488 



5. Inheritance in reciprocal crosses 489 



Bibliography 489 



INTRODUCTION 



The present contribution has a twofold purpose, to review and 

 discuss the hterature on teleost hybrids and to present a new 

 body of experimental data, which seem to throw added light on 

 various mooted questions and to lead to rather definite conclu- 

 sions concerning certain problems of inheritance. 



As material especially available for the study of the early 

 stages of hybrid development the teleosts are unexcelled by any 



447 



THE JOURN.\L OF EXPERIMENTAL '/OOLOGY, VOL. IG, NO. 4, 

 .MAY, 1914 



