OSCAR RIDDLE: A Study of the Fundamental Bars in Feathers. 165 

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

 Mitosis. II. Development of the Testes and Spermato- 

 gencsis in Moniezia 175 



No. 4. MARCH, 1907 



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

 Mitosis. II. Development of the Testes and Spermato- 



genesis in Moniezia 191 



GILMAN A. DREW : The Circulatory and Nervous Systems of the 

 Giant Scallop {Pecten tenuicostatus, Mighels), with Re- 

 marks on the Possible Ancestry of the Lamellibrancliiata, 

 and on a Method for Making Series of Anatomical Draw- 

 ings 225 



WILLIAM B. KIRKHAM: The Maturation of the Mouse Egg 259 



SHINKISHI HATAI : On the Zoological Position of the Albino Rat. 266 



CHAS. W. HARGITT : Notes on the Behavior of Sea-Anemones 274 



L. C. SHUDDEMAGEN : On the Anatomy of the Central Nervous 

 System of the Nine-banded Armadillo ( Tatu novemcinc- 

 tum Linn.^) 285 



No. 5. APRIL, 1907 



EDMUND B. WILSON: Note on the Chromosome- Groups of Meta- 



podius and Banasa 303 



H. H. NEWMAN : Spawning Behavior and Sexual Dimorphism 



in Fit ndit Ins heteroclitus and Allied Fish 314 



No. 6. May, 1907 



CHARLES T. BRUES : Systematic Affinities of the Dipterous Family 



Phoridce 349 



ALBERT C. EYCLESHYMER : Some Observations and Experiments 

 on the Natural and Artificial Incubation of the Egg of the 

 Common Fowl 360 



CLARA HEPBURN : A Peculiar Pelvic Attachment in Necturus 



maculatits 375 



H. D. SENIOR : Note on the Conus Arteriosits of Megalops cypri- 



noidcs Broussonct 378 V 



YKKNON L. KELLOGG : Sex Differentiation in Larval Insects 380 



G. G. SCOTT : Further Notes on the Regeneration of the Fins 



of Fu ndit lus heteroclitus 385 



