B. F. I.rTMAN. 



4. The nucleolus of the spermatocyte seems to form a tetrad 

 which becomes one of the thirty of the reduced number. 



BIBLIOGRAPHY. 



1. Baumgartner. W. S. 



'02 Spermatid Transformations. Kans. Univ. Soc. Bull.. Vol. I., 1902. 



2. Henking. H. 



'09 Das Ei von Picris brassicae neben Bemerkungen iiber samen u. Samen- 

 bildungen. Zeit. f. Wiss. Zoo!.. XLIX., 1890. 



3. Lubben. H. 



'07 t'ber die inncre Metamorphose der Trichopteren. Zool. Jahrb., Bd. 24, 

 1907. 



4. McClung. C. E. 



'99 A Peculiar New Element in the Male Reproductive Cells of Insects. Zool. 

 Bull., Vol. II.. 1899. 



5. '00 The Spermatocyte Division of the Acrididae. Kans. Univ. Quart.. Vol. 



1-X, 1900. 



6. 02 The Spermatocyte Divisions of the Locustidae. Kans. Univ. Sc. Bull., 



Vol. I.. 1902. 



7. 09 Spermatogenesis of Xiphidium fasciatum. Kans. Univ. Science Bull., IV., 



1909. 



8. McGill. C. 



'04 The Spermatogenesis of Anax junius. Univ. of Missouri Studies, II., 1904. 



9. Marshall. W. S. 



'07 The Early History of the Cellular Elements of the Ovary of a Phryganid, 

 Platyphylax designatus Walk. Zeits. f. Wiss. Zool., Bd. 86, 1907. 



10. Montgomery. T. H.. Jr. 



'98 The Spermatogenesis of Pentatoma up to the Formation of the Spermatid, 

 Zool. Jahrb., Bd. XII., 1898. 



11. Paulmier. F. C. 



'99 The Spermatogenesis of Anasa tristis. Journ. of Morph., Vol. XV., Supp., 

 1899. 



12. St. George. Valletta 



'76 Die Spermatogenese bei den Amphibien. Arch. f. Mik. Anat., B<1. XII.. 

 1876. 



13. Stevens. N M 



'05 Studies in Spermatogenesis with Special reference to the "Accessory Chro- 

 mosome." Carnegie Inst. Pub., 1905. 



14. Sutton. W. S. 



'00 S|K-rmatogonial Divisions in Brachyostola magna. Kans. Univ. Quart., 

 Vol. IX., 1900. 



15. Toyama. K 



'94 On the Spermatogenesis of the Silk-worm. Bull. Coll. Ag. Imp. Univ. Japan, 

 1 1., 1894. 



16. Voinov. D. N. 



'03 La Spermatogenesis chez le Cybister Roeseli. Arch. Zool. Exp., 1903. 



17. Vorheis, C. T. 



'05 Habits and Anatomy of the Larva of the Caddisfly. Platyphylax desig- 

 natus Walker. Trans. Wis. Ac. Sc., Arts and Let., Vol. XV., 1905. 



