e 4 The Endoparasitic Development of the Rhizocephala. 



utterly different embryonic states. I am anxious to cali attention to this point of view, not 

 only because I think that by bringing the development of the Rhizocephala into rela- 

 tion with other classes of faets we gain a certain explanation of it, but also because I hope 

 that Professor Giard may be induced to regard the only account I am able to give of 

 Rhizocephalan development as afTording another instance of Poecilogonie, and not as a 

 gigantic mystification. 



List of Literature. 



1. Delage, Y., L'évolution de la Sacculine, in: Arch. Z. Expér. (2) Tome 2 p. 417 1884. 



2. Schimkewitsch, W., Ùber die Untersuchungen von J. O. Pekarsky iiber die Entwickelung von Pelto- 



gaster paguri, in: Trav. Soc. Naturai. Pétersbourg Voi. 28 p. 218 1898. 



(For controversial literature see Chapter 1 pp. 2 — 5.) 



