TEXTBOOK 



OF THE 



EMBRYOLOGY OF INVERTEBRATES 



Dr. E. KOESCHELT, 



PROFESSOR OF ZOOLOGY AND COMPARATIVE 



ANATOMY IN THE UNIVERSITY 



OF MARBURG. 



Dr. K. HEIDER, 



PROFESSOR OF ZOOLOGY IN THE UNIVERSITY 

 OF BERLIN. 



TRANSLATED FROM THE GERMAN 



BY 



MATILDA BERNARD. 



REVISED AND EDITED WITH ADDITIONAL NOTES 



BY 



MARTIN F. WOODWARD, 



DEMONSTRATOR OF ZOOLOGY. ROYAL COLLEGE OF SCIENCE. 



Vol. II. 



PHORONIDEA, BRYOZOA ECTOPROCTA, BRACHIOPODA, 

 ENTOPROCTA, CRUSTACEA, PALAEOSTRACA. 



LONDON: 



SWAN SONNENSCHEIN AND CO., Ltd. 



NEW YORK: THE MACMILLAN CO. 



1899. 



