ACCESSORY CHROMOSOME IN A FROG. 79 



LITERATURE. 



1. Bachhuber, L. J. 



"16 The Behavior of the accessory Chromosomes and of the chromatoid Body 

 in the Spermatogenesis of the Rabbit. BIOL. BULL., Vol. 30, 1916. 



2. Hermann, F. 



'89 Beitrage zur Histologie des Hodens. Archiv. mikr. Anat., Bd. 34, 1899. 



3- 



'97 Beitrage zur Kenntniss der Spermatogenese. Archiv. mikr. Anat., Bd. 

 L., 1897. 



4. Janssens, F. A. 



'01 La spermatogenese chez les Tritons. La Cellule, t. 19. 1901. 



5. King, Helen Dean. 



'12 Dimorphism in the Spermatozoa of Necturus Maculosus. Anat. Record, 

 Vol. 6, 1912. 



6. 



'07 The Spermatogenesis of Bufo lentiginosus. Am. Journ. of Anat., Vol. 1, 

 1907. 



7- - 



'01 The Maturation and Fertilization of the Egg of Bufo lentiginosus. Journ. 

 Morph., Vol. 17, 1901. 



8. Kingsbury, B. F. 



'01 The Spermatogenesis of Desmognathus fusca. Amer. Journ. Anat., Vol. i, 

 1901. 



9. Lebrun, H. 



'01 La vesicule germinative et les globules polaires chez les Anoures. La 

 Cellule, t. 19, 1901. 



10. Robertson, W. R. B. 



A Supernumary Sex-chromosome in the Grasshopper (unpublished). 



