CONTENTS OF VOLUME FOURTH. 



BY WILLIAM COOPER. Page. 



Description of five species of Vespertilio 53 



On two species of Molossus 64 



(tn two >j.ccicbi of Plecolus "1 



BY ISAACHAR COZZENS. 



Description of three new fossils 157 



BY H. B. CROOM. 



On tbe genus Sarracenia 9» 



BY JAMES B. DANA. 



On a new mineralogical Nomeclature 9 



BY ASA GRAY. 



Remarks on the structure and ailinities of the Ccratophyllaceee- ... 41 



Melanthacearum America; septentrionalia revisio ]06 



BY JOHN C. JAY. 



Description of new species of shells IC9 



BY WILLIAM L. JONES. 



On a new species of Woodpecker 489 



BY GEORGE N. LAWRENCE. 



< m a new species of Anscr 171 



On a new species of Procellaria 175 



BY JOHN LE CONTE. 



'in a new species of Apus 155 



BY JOHN L. LE CONTE. 



Monograph of the. genus Passimachus M2 



On Coleoptera indigenous to the eastern and western continents - - . ]. r iR 



In :uc of Geodcphagous Coleoptera of the United States - - - - 17^ 



BY 0. W. MORRIS. 



On the quantity of Rain at different Heights 496 



Meteorological Observations 500 



BY JOHN II. REDFIELD. 



On the fossil fishes of ConnecticDt and Massachusetts 35 



if some new species of shells 163 



On the characters of Cypreea reticulata and C. histrio 477 



of new species of fiullia and Marginalia 491 



HY JOHN TORREY. 



eryoi Vauquelinite in the United States 76 



r North American plants b» 



JiY JAMES F. WARD. 



' i the ippMCSAM of the l'j rrhula cuucleator in the vicinity of New York - 61 



