CONTENTS OF VOL XII. 



No. i. DECEMBER, 1906 P AGE . 



T. H. MONTGOMERY, JR.: The Oviposition, Cocooning and Hatch- 

 ing of an Aranead, Theridinm tepidariorum C. Koch. i 

 C. V. MORRILL, JR.: Regeneration of Certain Structures in Fun- 



dulus heteroclitus 1 1 



E. P. LYON : Note on the Geotropism of Arbacia Larva 21 



E. P. LYON: Note on the Heliotropism of Palcemonetes Larva... 23 

 M. LOUISE NICHOLS : Chromosome Relations in the Spermatocytes 



of Oniscus 26 



C. H. TURNER: A Preliminary Note on Ant Behavior 31 



J. F. McCLENDOX : On the Development of Parasitic Copepods 



Part I. 37 



No. 2. JANUARY, 1907 



j; F. McCLENDON : On the Development of Parasitic Copepods. 



Part II 53 



C. M. CHILD : Studies on the Relation Between Amitosis and 



Mitosis. I. Development of the Ovaries and Oogenesis in 



Moniezia 89 



T. H. MONTGOMERY, JR.: Probable Dimorphism of the Eggs of 



an Aranead 115 



K. FOOT and E. C. STROBELL : The "Accessory Chromosome" 



of Anasa tristis 119 " 



No. 3. FEBRUARY, 1907 



OILMAN A. DREW : The Habits and Movements of the Razor-she/! 



Clam, Ensis directus, Con 127 



J. F. McCLENDON : Experiments on the Eggs of Chcetopterus and 



Asterias in which the Chroma fin was Removed 141 



H. D. SENIOR : The Con/is Arteriosus in Tarpon atlanticits ( Citvier 



e^ Valenciennes} X 4^ 



VERNON L. KELLOGG: Some Silkworm Moth Reflexes 152 



EDWIN LINTON : An Abnormal Cestode Proglottid 155 



S. J. HOLMES: Observations on the Young of Ranatra quadri- 



dentata Stal... i5 8 



