INDi:X. 



575 



Lea, Isaac, 



Review of his paper on ihe Naiades 537 



His caution in bringing forward new 

 species of the Genus Uhio 541 



Censures Lamarck without cause 542 



Comes out with fifty-one new spe- 

 cies, of which it is doubtful whether 

 one is new 542; 



Twenty-five of these previously de- 

 scribed 542 



His blunder about Connate Shells, 

 and the sudden death of tlie genus 

 Symphynota 543 



His plagiarisms from other concho- 

 logists 544 



His attempt to obscure the labours 

 of those who preceded him 547| 



The figures of Say and Conrad bet- 



Page 

 Murchison, Rod. Impey, 



Elected president of the Geological 



Society of London 45 



His address at the York meeting. . . 476 



ter than those of Lea 548 



Naiades, 



Review of Lea on the Naiades. . . . 537 

 Natural Science, 



Epitome of the progress of. 49 



Do. do 



Do. do 



Do. do 



Do. do 



Natural Bridge, 



In Rockbridge county, Virginia. 



Plate XH 414 



Natural Tunnel, 



In Scott county, Virginia. Plate X. 347 



97 

 145 

 193 

 241 



Limestone Caves in Schoharie, N. Y. 

 Explored by Mr. Gebhard and 



others 381 



Long, Lt. Col. 



Description of a natural tunnel in 

 Scott county, Virginia (plate X.), ex- 

 tract of a letter from him 347 



Megatherium, 



Skeleton of, discovered in B. Ayres 192 

 Megalonyx laqueatus, 



A new species 74 



Men of War, 



On round stems for 322 



Mercury, 



On the atomic weight of. 320 



Do. do 444 



Meteorological Observations, 



At Wilmington, Del, for June and 



July, 1831 224 



Do. for Aug. Sept. and Oct. 1831.. . 287 



Do. for Nov. 1831 325 



Do. for Dec. 1831 377 



Do. for Jan. 1832 430 



Do. for Feb. 1832 



Do. for Mar. 1832 524 



Mexican Indians, 



Antiquities and languages of. 104 



Do. do 176 



Pyramids of Teotihuacan 234 



Mineral and Metallic Veins, 



Plate XIV 481 



Mineralogy of Nova Scotia 431 



Mitchell, Dr. J. K. 



Oa penetrativeness of fluids 238 



Mitchnl, Sam. Latham D. 



Obituary notice of 228 



M'Murtrie, Dr. 



HLs translation of Cuvicr's Animal 



Kingdom 47 



Review of it 447 



Do. — continued 549 



Morea, 



Elevation of. 192 



Moss. 



A golden green reflected from it. . . 335 



Naturalist, Journal of, 



Passage from 95 



Natural History, 



Collection of objects of, from India 288 

 New Holland, 



Bone Caves in 47 



Niagara, 



Origin of the cataract of Plate II. 13 

 Nomenclature, 



On the abuses of 28 



North American Lakes, 



Supposed tides of 833 



Ohio Shells 370 



Owen, Dr. J. S. 



On certain fossil remains found in 



Maryland II5 



Pacific Ocean, 



Discovery of a reef in 528 



Paganini, 



Physiological notice of 333_ 



Paint, 



How to remove its smell 236 



Painting, 



A new practice of 330 



Petrified Forest, 



Account of 233 



Philadelphia, 



On the geological character of the 



beds on which it stands 363 



Plants, 



On the acclimating principle of . . . . 108 

 Platina, 



Ma.ss of, weighing 27 lbs 121 



Magnetic reaction of 331 



Poisons, 



Eflbcts of, on living vegetables.. .. 124 

 Poulson, C. A. 



His translation of a monograph of 

 the bivalve shells of Ihe river Ohio. . 370 

 Presentiment in a Goose, 



Anecdote of 383 



Primary Rocks, 



General remarks on their consti- 



tueiilK 308 



Prospectus i 



