SPERMATOGENESIS OF APHIDS. 361 



Tannreuther, G. W. 



'07 History of the Germ Cells and Early Embryology of Certain Aphids. 



Zool. Jahrb. Anat. Ontog., Bd. 24. 

 Wallace, L. B. 



'05 The Spermatogenesis of the Spider. BIOL. BULL., Vol. 6, No. 3. 

 Whitney, D. D. 



'17 The Production of Functional and Rudimentary Spermatozoa in Roti- 

 fers. BIOL. BULL., Vol. 33. 

 '18 Further Studies on the Production of Functional and Rudimentary 



Spermatozoa in Rotifers. BIOL. BULL., Vol. 34. 

 Wilson, H. V. 



'n On the Behavior of Dissociated Cells in the Hydroids, Alcyonaria and 

 Asterias. Jour. Exp. Zool., Vol. n. 



