VI TRANSLATORS PREFACE 



useful supplements to the more literal translations of the 

 original. In such cases an indication of the authority has 

 been omitted, since no uncertainty is likely to result from 

 the omission. 



To avoid confusion in citation and to indicate at a glance 

 the additions to the Literature of the several chapters, the 

 references not included in the original have been put in the 

 form of Appendices and numbei-ed with Roman numerals. It 

 has been the aim to make these additions include all the 

 important papers which have appeared since this Part was 

 first issued. 



In ti-anslating Anlage we have employed the word funda- 

 ment — a use which one of us has suggested and defended in 

 the Translators' Preface to Text -hook of the Evibryologij of 

 Man and Mammals^ by Dr. Oscar Hertwig, etc. (Swan 

 Sonnenschein & Co : London, 1892). 



We are under deep obligation to our colleagues Doctors 

 C. B. Davenport and Gr. H. Parker for their friendly and 

 self-sacrificing as.sistance, and we desire to thank both of 

 them for their aid — Dr. Davenport for having rendered us 

 valu.able service in i-evising the whole of the manuscript ; 

 Dr. Pai'ker for assistance in revising parts of the manuscript 

 and reading the whole cf the proof. 



It is with reluctance that we have felt compelled by the 

 pressure of other duties to relinquish to others the task of 

 completing the ti'anslation of this admirable work. We 

 trust that one of the advantages of this change will be the 

 more rapid publication of the translation of the remaining 

 parts than could possibly have been hoped for from us. 



THE TRANSLATORS. 



Cambridge, Mass., U.S.A. 



