




CONTENTS OF THE FEBRUARY NUMBER 
A Mendelian Interpretation of Variation that is Appar- 
ently Continuous, Professor E>warp M, East. 
Color Inheritance ‘in Lychnis dioica L, Dr. GrorcEx 
HARRISON SHULL, 
Is Regeneration a Repetition of the Ontogenetic and 
Phylogenetic Processes? SERGIUS MoRGULIS. 
Genetical Studies on C£nothera. BrapLEY Moorr 
DAvVIs. 
Shorter Articles and Discussion : 
The Mendelian View of Melanin Formation. Dr. 
W. J. SPILLMAN, 
Notes and Literature: Seton’s Life History of Northern 
Animals, Dr. J. A. ALLEN. Do Parthenogenetic 
Eggs of Hymenoptera Produce only Males, A, 
FRANKLIN SHULL, . 

CONTENTS OF THE APRIL NUMBER 
The Origin of the Electricity Tissues in Fishes. Pro- 
fessor ULRIC DAHLGREN, 
The Material Basis of Mendelian Phenomena. Dr. RE- 
GINALD R. GATES, 
Mendelian Phenomena without de Vriesian Theory. 
Dr, W. J. SPILLMAN, 
The Evolution of New Forms in Viola through Hybrid- 
ism, Professor EZRA BRAINERD, 
Tertiary Archhelenis. Dr. A. E. ORTMANN. 
Shorter Articles and Discussion: The Probable-Origin 
of the Crinoidal Nervous System : AUSTIN H. CLARK, 
Notes and Literature: The Question of Sex Determina= 
tion: Professor H. E. JORDAN. Recent Investiga- 
tions on the Comparative Anatomy of Conifers ; Pro= 
fessor E, C, JEFFREY. 
CONTENTS OF THE JUNE NUMBER 
The Botanical Society of America: 
The Nature of Physiological;Response, The Late Pro- 
fessor CHARLES R, BARNES, 
The Place of Plant Responses in the Categories of Sensi- 
tive Reactions. Professor FREDERICK C. NEWCOMBE. 
The Larva and Spat of the Canadian Oyster. Dr, J. Sar- 
FORD, 
The Alimentary Canal of a Carboniferous Salamander, 
Dr. Roy L, Moopig. 
Shorter Articles and Discussion: Observations on the 
Spawning Habits of Hydroides Dianthus, Professor 
CHARLES W. HARGITT. 
Notes and Literature: 
Protozoa—Doflein’s Lehrbuch der Protozoenkunde : 
Professor CHARLES A. Kororp. Celebrating Dar- 
win’s Greatness and Darwinism’s Weakness, V. L. K, 

The American Naturalist 
A Monthly Journal, established in 1867, Devoted to the Advancement of the Biological Sciences 
with Special Reference to the Factors of Organic Evolution and Heredity 






CONTENTS OF THE MARCH NUMBER 
The Imperfection of Dominance and Some of its Con- 
sequences, Dr. C. B. DAVENPORT. 
Experimental Evidence on the Effectiveness of Selection. 
Professor H. S. JENNINGS. 
The Artificial Production of the Parthenogenetic and 
Sexual Phases of the Life Cycle of Hydatina senta. 
A, FRANKLIN SHULL 
The Significance of the Courtship and Secondary Sexual 
Characters of Araneads, Professor THos. H. MontT= 
GOMERY, JR. 
Notes and Literature : 
Notes on Ichthyology, President, Davyip STARR JOR- 
DAN. A New Catalogue of Hemipterous Insects, 
Professor T. D, A. COCKERELL, 
CONTENTS OF THE MAY NUMBER 
A Review of Some Recent Criticisms of the Restorations 
of Sauropod Dinasaurs. Dr. J. W. HOLLAND, 
Anatomical Characters in the Evolution of Pinus, 
TRVING W. BAILEY. 
Facts about the ‘‘ Lobster Pearl.’? Professor FRANCIS 
H. HERRICK. 
Shorter Articles and Discussion: An Eighteenth Cen- 
tury Microscope, Professor BASHFORD DEAN, Sto- | 
matolepas, a B.cnacle Commensal in the Throat of 
the Loggerhead Turtle. Henry A. PinsBry. The 
Age of Sp: 4 Sires, CASPER L. REDFIELD. 
Notes and L.cerature: Biometrics—Recent Quantitative 
Studies in Variation in Social Insects, Dr. RAy- 
MOND PEARL, Experimental Zoology—The Effects of 
Extirpation and of Transplantation of the Repro- 
ductive Organs in Insects, E. N. BROWNE. Wheeler 
on Ants, Professor G, H. PARKER, 
CONTENTS OF THE JULY NUMBER 
A Consideration of the ‘Species Plantarum’’of Linnaeus 
as a Basis for the Starting Point of the Nomenclature 
of Cryptogams, Professor W. G. FARLOW. 
Notes on Some Beaufort Fishes. E. W. GuDGER. 
On the Effect of External Conditions on the Reproduce 
tion of Daphnia. Dr. J. F. McCLENDON. . 
Are Fluctuations Inherited? Dr. Harry H. Love, 
Inheritance in Potatoes. Professor EDWARD M, EAST. 
Shorter Articles and Correspondence: The Age of Speed 
Sires: Professor F, R. MARSHALL. 
Notes and Literature: Russo on Sex-Determination and 
Artifical Modification of the Mendelian Ratios, Pro- 
fessor W. E. CasTLE ; The Bubonic Plague, Professor 
H. B. WARD; Desert Plants, WILLIAM L, Bray, 




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