230 N. M. STEVENS. 



Stevens, N. M. 



'03 On the Oogenesis and Spermatogenesis of Sagitta. Zool. Jahrb., XVIII. 



'05 Further Studies on the Oogenesis of Sagitta. Ibid., XXI. 



"05 Studies in Spermatogenesis, I. 



'06 Studies in Spermatogenesis, II. Carnegie Inst., Pub. 36, Parts I. and II. 



'08 A Study of the Germ Cells of certain Diptera with Reference to the Hetero- 



chromosomes and the Phenomena of Synapsis. Journ. Exp. Zool., V. 

 '08 The Chromosomes in Diabrotica viltata, Diabrotica soror and Diabrolica 



1 2-punctata. A Contribution to the Literature on Heterochromosomes and 



Sex Determination. Ibid. 



'09 Further Studies on the Chromosomes of the Coleoptera. Ibid., VI. 

 '10 The Chromosomes in the Germ Cells of Culex. Ibid., VIII. 

 'n Further Studies on Heterochromosomes in Mosquitoes. Biol. Bull., XX. 

 'n Heterochromosomes in the Guinea-pigs. Ibid., XXI. 

 '12 Further Observations on Supernumerary Chromosomes and Sex Ratios 



in Diabrotica soror. Biol. Bull. 

 Wilson, E. B. 



'09 Studies on Chromosomes. V. The Chromosomes of Metapodius, a Con- 

 tribution to the Hypothesis of the Genetic Continuity of the Chromosomes. 



Journ. Exp. Zool., VL 

 '10 Studies on Chromosomes. VI. A New Type of Chromosome Combination 



in Metapodius. Ibid., IX. 



