vi 
CONTENTS 
ZOOLOGY 
PAGE 
Flagellate Atfinities of Trichonympha By Charles Atwood Kofoid and Olive Swezy 9 
Restoration of Vitality Through Conjugation .By Gary N. Calkins 95 
The Effect of Transplanting Limbs upon the Formation of Nerve Plexuses 
AND THE Development of Peripheral Neurones By S. R. Detwiler 324 
On the Ethology of Chiton Tuberculatus By W.J. Crozier and L. B. Arey 496 
The Nervous Organization of a Nudibranch By L.B. Arey and W. J. Crozier 498 
GENETICS 
Quantitative Relations Between Chromatin and Cytoplasm in the Genus Ar- 
CELLA, with their RELATIONS TO EXTERNAL CHARACTERS By R. W. Hegner 19 
Is THE Arrangement of the Genes in the Chromosome Linear?. ..ByW. E. Castle 25 
The Linkage System of Eight Sex-Linked Characters of Drosophila Virilis 
(Data of Metz) ByW.E. Castle 32 
Piebald Rats and the Theory of Genes By W. E. Castle 126 
Linear Arrangement of Genes and Double Crossing Over By Harold H. Plough 167 
The Spatial Relations of Genes By A. H. Sturtevant, C. B. Bridges, and T. H. Morgan 168 
Inheritance of Quantity and Quality of Milk Production in Dairy Cattle 
By W. E. Castle 428 
Are the Genes Linear or non-Linear in Arrangement? By W. E. Castle 500 
On Variation in Tartary Buckwheat, Fagopyrum Tataricum (L.) Gaertn. 
By Jacob Zinn 506 
A Benign Tumor THAT is Hereditary IN Drosophila By Mary B. Stark 573 
PHYSIOLOGY AND PATHOLOGY 
A Comparison of White and Colored Troops in Respect to Incidence of Disease 
By Lt.-Col. A. G Love and Maj. C. B. Davenport 58 
Congenital Arterio-Venous and Lymphatico-Venous Fistulae. Unique Clinical 
AND Experimental Observations By William S. Halsted 76 
An Analysis of the Relation Between the Temperature and the Duration of a 
Biological Process By Selig Hecht 146 
The Temperature of the Human Skin 
By F. G. Benedict, W. R. Miles and Alice Johnson 218 
On the Problem of the Production of Fat from Protein in the Dog 
By H. V. Atkinson and Graham Lusk 246 
The Influence of Degeneration of One Vagus Nerve upon the Development 
OF Pneumonia By S. J. Meltzer and Martha Wollstein 493 
The Effect of Milling on Digestibility of Graham Flour 
By C. F. Langworthy and H. J. Deuel 514 
Growth and Reproduction in Fowls in the Absence of Carotinoids and the 
Physiological Relation of Yellow Pigmentation to Egg Laying 
By Leroy S. Palmer 582 
On the Embryological Basis of Human Mortality By Raymond Pearl 593 
ANTHROPOLOGY AND PSYCHOLOGY 
On the Mean Age at Death of Centenarians By Raymond Pearl 83 
The Archaeology of the SouTmvEST: A Preliminary Report By N. C. Nelson 114 
