CONTENTS. 
A Grooved Stone Axe from the Ohio Drift. H. C. MERCER 
Biologic Origin of Mental Variety. H. NICHOLS 
Fossils and Fossilization. L. P. GRaATAcAP, 16, IQI, 
Bacterial Diseases of Plants. E. F. SMITH ERETI E 
Nocturnal Protective Coloration of Animals. A. E. VERRILL........... 
Inferior Boundary of the Quaternary ees O. H. HERSHEY 
Pouched or Pocket Gopher. C. Is WEBSTER,....,.cccessessrenesesed edessoos 
Undescribed Species of Ra F. SMITH.. 
Birds of New Guinea. G. S. M 
Scope and Position of fiodkeniGty. A. MATHEWS 
Polyphyletic Disposition of Lichens. F. CLEMENTS 
Some M itah Clad c r: Ee S 
The Floida Sea Monster. A R. VERRI aa o a N 
The Optic Lobes of the Bee’s Brain. F. C. KENYON 
Notes on the Flora and Fauna of Mammoth Cave. R. E. CAL ee 
es in Economic Ornithology, with Reference to the- tata. 
JUDD 
Dr. daa on the Development of the Vertebral Column. O. P. Hay. 
The san serait, Geological Congress. P. FRAZERe..sssscseeesseeees 406, 
In Memoriam, E. D. Cope. P. FRAZER 
Obituary 3 Notice of a es Cope. J.S. KINGSLEY 
Toxodon E. D. COPE ; 
e: of beret a C. R. Eastman 
Golden-eye or Lace-wing Fly. C. M. WEED. 
Biological Studies in Massachusetts. G. C. WHIPPLE........--.503, 576, 
n the Affinities of Tarsius : A Contribution to the Phylogeny of the 
imates. C. BABE AAE GEA ER e EET E ET E 569; 
Natural Impulses.` W. B 
New Observations on the Origin of the aliigo Islands, with Re- 
marks on the Geological Age of the Pacific Oċean. JG: ÉAUR. 
661, 
The Swamps of Oswego County, N. Y., and their Flora.” W. NE 
ROWLEE.......- : : «2.690, 
Biology and Medicine. - W. H. WELCH.. U seen 
Hair and Feathers. J. S. KINGSLEY 
Birds of the Galapagos Islands : A Criticism of Mr. Robert Ridgway" s 
Recent Paper. G. BAUR.. 
