142 LIST OF CONTRIBUTORS. 



Nolan, Edward J. Continued. 



Biographical note on John Meigs, P '95, 567 



Biographical notices of Harrison Allen and George Henry 



Horn. P '97, 505 



A memorial of Dr. Joseph Leidy. P '98, 465 



Biographical notice of Henry C. Chapman. P '10, 255 



Norris, Wm. F. On the use of a weak solution of nitrate of silver 



and chloride of gold. P '70, Biol. 3 

 Norris, Thaddeus. Remarks on a species of Osmerus taken in the 



Schuylkill, below Fairmount Dam. P '61, 58 



On the distribution of Salmo. P '62, 102 



Remarks on the new species of Osmerus (O. sergeanti). 



P '68, 93 



Remarks on fish culture. P '70, 110 



On the stocking of the Delaware with Salmo salar. P '72, 163 



Norwood, J. G. and John Evans. On fossils from Missouri. 



P '50, 66 

 Norwood, J. G. and Henry Pratten. Notice of Producti, found 

 in the Western States and Territories with descriptions of twelve 

 new T species. J III, 5. 



Notice of the genus Chonetes, as found in the Western States 



and Territories, with descriptions of eleven new species. J III, 123 



Notice of fossils from the Carboniferous series of the Western 



States, belonging to the genera Spirifer, Bellerophon, Pleuroto- 

 maria, Macrocheilus, Natica and Loxonema, with descriptions of 

 eight new characteristic species. J III, 71 



Nuttall, Thomas. Observations on the genus Eriogonuni and the 

 natural order Polygonese of Jussieu. J I, 24, 33 



■ An account of two new genera of plants, and of a species of 



Tillaaa and Limosella, recently discovered on the banks of the 

 Delaware, in the vicinity of Philadelphia. J i. 111 



Description of Collinsia, a new genus of plants. J i, 189 



Observations on the geological structure of the valley of the 



Mississippi. J ii, 14 



— ■ Descriptions of rare plants recently introduced into the 

 gardens of Philadelphia. J ii, 179 



— Observations on the genus Oryzopsis. J iii, 125 



— Remarks on the species of Oorallorhiza indigenous to the 



United States. J iii, 135 



— A letter on American spodumen. j iii, 284 

 — • Description of two new genera of the natural order Crnci- 



eerse. j v, 132 



