STUDIES ON GERM CELLS 



499 



WiEMAN, H. L. 1910 c The degenerated cells in the testis of Leptinotarsa 



signaticollis. Jour. Morph., vol. 21. 

 WiERZEjsKi, A. 1906 Embryologie von Physa fontinalis. Zeit. wiss. Zool., 



Bd. 83. 

 WiJHE, J. W. VAN 1889 Ueber die Mesodermsegmente des Rumpfes, und die 



Entwieklung des Excretionssystems bei Selachiern. Arch. mikr. 



Anat., Bd. 33. 

 WiLKE, G. 1912 Zur Frage nach der Herkimft der Mitochondrien in den Gesch- 



lechtzellen. Anat. Anz., Bd. 42. 

 Will, L. 1888 Ertwicklungsgeschichte der viviparen .\phiden. Zool. Jahrb., 



Bd. 3, Anat. 

 Wilson, E. B. 1895 Archoplasm, ccntrosomc, and chromatin in the sea-urchin 



egg. Jour. Morph., vol. 11. 



1900 The cell in development and inheritance. New York. 



1903 Experiments on cleavage and localization in nemertine egg. 



Arch. Entw.-Mech., Bd. 16. 

 Winiwarter, H. von 1912 Etudes sur la spermatogenese humaine. Arch. 



Biol., t. 27. 

 WiTLAcziL, E. 1884 Entwicklungsgeschichte der Aphiden. Zeit. f. wiss. 



Zool., Bd. 40. 

 Woods, F. A. 1902 Origin and migration of the germ cells in Acanthias. Am. 



Jour. Anat., vol. 1. 

 WooDwoHTH, C. 1889 Studies on the embryological ilcvelopment of Euvanessa 



antioj^a. In: The butterflies of the eastern United States and Canada; 



by S. H. Scudder. 

 Zaviiel. .J. 1907 Paedo- und Parthenogenesis bei Tanytarsus. Cas. Ceska 



Spol. Entomolog. Prag., vol. 4. 

 Zeleny, C 1904 Experiments on the localization of the developmental factors 



in tlie nemertine egg. Jour. Exp. Zool., vol. 1. 



ABBREVIATIONS 



b.c, blastoderm cell 



c, cytoplasm 



ch, chorion 



cMp, 'Chromosomenmittleplatte' 



r.Ji, cleavage nucleus 



cR, 'Chromatinreste' 



en, ovarian envelope 



ep, epithelial cell 



f.ep, follicular epithelium 



f.n, female nucleus 



g.v, germinal vesicle 



m, mesoderm 



m.s, maturation spindle 



71. c, nurse chamber 



n.c.n, nurse cell nucleus 



<)j>i, ovarian mesoderm 



ooc, oocyte 



ooc.n, oocyte nucleus 



oog, oogonium 



p.h, polar body 



pd, pole-disc 



p.g.c, primordial germ cell 



p. PI, 'polares Plasma' 



.s", spermatozoon 



fipg, spermatogonium 



I.e., terminal cap 



