CONTENTS. 
XIV. On the Analogies between the Modern Igneous Rocks 
and the so-called Primary Formations, and the Meta- 
morphic changes produced by heat in the associated 
sedimentary deposits; by James D. Dana, - - 
XV. On the Temperature limiting the Pe cca of ka 
@ by James D. Dana, : : ; 
XVI. On the Areas of Sitatlcnge i in the Pacifa.' as ited 
by the Distribution of Coral Islands; by James D. 
Dana,—with a m 
ap, 
_ XVII. Abstract of the Proceedings of the Fourth Séscidh of the 
Association of American Geologists and Naturalists, - 
XVIII. Description of a new species of Torpedo ; by D. Hum- 
pureys Storer, M. D.—with a plate, 
XIX. Description of some New: Ke of Plants dy s. B. 
Bucxuey, A. M., “. - 
XX: Ornithichnites of the ME ier Sandstoied ie’ 
- the Dinornis of New Zealand, - 
XXI. On the Great Comet of 1843; a Mr. s. C. Waskes ‘a. 
Prof. E. O. Ken ENDALL, - 
“XXIL Remarks on Mr. Owen’s ace. i“ the Editors ¢ on Dr. 
Harlan’s. New Fossil Mammalia, §- — - 
XXxiil. Bibliographical Notices :—Agassiz’s Histoire Neiitetle 
des Poissons d’Eau Douce de l'Europe Centrale, and 
Vogt’s Embryologie des Salmones, 211 .—Hooker’s 's Ico- 
nes Plantarum, 214. —Tuckerman’ s Enumeratio Method- 
8 
ica Caricum quarundam, 216.—Endlicher and Martius’ 3 " 
Flora Brasiliensis, 217.—Chauvenet’s Binomial Theorem _ 
and Logarithms, 218.—Transactions of the Association 
of American Geologists and Naturalists,1840-1842, 220 
Nsooluabessdiiaies of certain siliceous tubes. ‘ Ealgunites) 
‘ formed in the earth, 220.—Supplementary notice of the Ce- 
1, 222.—_Cambridge Observatory, 224.—Notices 
‘Taurus c) 
of Botanical collections, 225.—Iodine in Phanerogamic Plants 
me sses. ent of Carbonic Acid by the Roots 
. of Plants, 227.—Filariee in the Blood of a living Dog: Experi- . 
ments of Karsten, relative to the formation of the “ij images. | 
of Moser,” 228.—Great Comet of 1843, 229.—Second Comet _ 
of 1843: Meteorie | 
