CONTENTS. 
LEADING ARTICLES: 
Gases in Living Plants, J. C. ARTHU 
1 
Certain Shell Heaps of the St. John’s River, Florida (Illustrated), CLARENCE 
B. Moore 8, 113, 605, 
14 
Legends of the Sumiro Accadians of Chaldea, ALICE BODINGTON 
The Flight of Birds (Illustrated). J. LANCASTER 
Joint Formations Among the Invertebrata (Illustrated). BENJAMIN SHARP... 
The Ancyclopoda, Chalicotherium and Artionyx (Illustrated) H. F. OSBORN.. 
The Quantity of Human Life, J. Lawron WILLIAMS 
The Titanotherium Beds (Illustrated). 
An _—_ Produced oe without Charictatiasice of the Mother (Illus- 
é H. Bo 
‘On the ee of p POES RSE R. W. SHUFELDT. 
The Genealogy of Man (Illustrated). E. D. COPE 
The Probable Physiognomy of the Cretaceous Plant Population, C. MACMIL- 
LAN... 
An Extreme Case.of Parasitism, ROBERT HESSLER 
'On the TUNE and Distribution of the North Aaron Unionidae, with 
s on the West Coast aries C. T. Sm 
Recent uaa of. Catnivorous Plants; J.-G. Saabr its. ois cists wsiesseiesn’: dhevens 
A New Theory of the Mechanical rt x the Metapodial Keels of Di- 
plarthra (Illustrated). J. L. WORTMA 
Among the Cliff-Dwellers (Illustrated). C. c WEBSTER 
New Discoveries of Fossil Mammalia of Southern Patagonia, F. AMEGHINO.. 
Recent Researches upon the Succession of the Teeth in Mammals, H. F. Os- 
BO: 
Symbiosis and Mutualism in Lichens, ROSCOE POUND.....-.sssseee cesses sesseseee 
Evolution and Dichromatism in the Genus Megascops, E. M. HASBROUCK ...521, 
The Cinnamon Harvest-Spider and its Variations (Illustrated). C. M. WEED. 
Some —— in etic and Phylogeny in Brachiopoda (Illustrated), 
C. E.B 
ssssesse 
Notes on nog Tarea of Europe ue BasHFoRD DEAN. 625, 
The Spore-Forming Species of the Genus Saccharomyces, J. C: BAY........... 
The Philosophy of Flower Seasons, H. L. CLARKE 
The Morphology of Root ebeiles of Leguminosae (Illustrated). ALBERT 
On oe — of the Carapace in the Devonian Crustacean Rhinocaris ; and 
e Relation of the Genus to Mesothyra and the Phyllocardia (Ilustra 
p J M. CLARKE 
708 
10 
118 
599 
697 
685 
