752 INDEX 



Synapsis and the chromatoid bodies. Sper- X TAN CLEAVE, H. J. Studies on cell 



matogenesis of the American crayfish, V constancy in the genus Eorhynchus 253 



Cambarus virilis and Cambarus immunia Variations and the formation of the first sper- 



(?),withspecialreferenceto...... 587 matocvte chromosomes in the European 



System of Desmognathus fusca. borne fea- earwig, Forficula sp. Chromosomal 559 



tures in the development of the central 

 nervous 511 



