Dr. J. S. Newberry on American Fossil Fishes. 73 



Nitrate. — The nitrate of triethylamine appears to be liquid at 

 ordinary temperatures, and is obtained by neutralizing aqueous 

 triethylamine with nitric acid, gently evaporating at a low tem- 

 perature until the solution is somewhat concentrated, and then 

 placing in vacuo over caustic soda for some weeks. A thick 

 syrupy liquid is thus obtained which does not crystallize. When 

 filtering paper is imbued with this liquid and brought near to a 

 flame, it deflagrates with a sudden flash. 



A double sulphate of zinc and triethylamine isomorphous 

 ■R-ith the double sulphates of Mitscherlich's group does not appear 



Art. Ylll.— Notes < 



In the progress of geological investigation in North America 

 the remains of a large number of fishes have been brought 

 light, and are now preserved i " " " ■' 



pnvate, m different parts of the ^ . 



described by Redfield, Gibbes, Jackson, 

 the descriptions given of them are 

 01 works, some out of print, and 



collections, publi< 



Most of these have been 



, Leidy and myself, but as 



tered through a multitude 



, — „, j^x.^„, „«v^ x^wot not readily accessible to 



the student, I have been frequently requested to publish a resume 

 01 what is known of our fossil fishes, with references to the 

 P^Pf rs in which they are described. 



-This I now propose, as briefly as possible to do, and for con- 

 venience, will divide the subject into several parts, according to 

 the formations in which fossil fishes have been found. 

 I. Fishes of the Devonian Formation. 

 t'p to the present time no well marked remains of fishes have 

 peea discovered in the Silurian rocks of this continent, but, as 

 ]^ the old world, in the Devonian strata they are not unfrequent. 

 "Y far the largest number of specimens and species have been 

 obtained from the Corniferous limestone of western New York, 

 yhio, and Indiana. The Portage group in Ohio, and the Catskill 

 J^^^w York and Pennsylvania have also furnished a number of 

 ^Jj^jemains but of different genera from those of the Corniferous. 

 I he papers which contain descriptions of our Devonian fishes 



I^r. p. D. Owen and Dr. J. G. Norwood r " Description of a new fossil 



^'sh from the Paleozoic Rocks of Indiana."— Amer. Jour, Science, [2], 

 ^^Mp. 367. 1846. 

 ■^ rot. Joseph Leidy : "Description of some remains of fishes from the 



^arboniferous and Devonian Formation of the United States."— Journal 



^'^ad. Nat. Sciences Phil., [2], vol. iii, p. 159, 1856. 



^^- Jour. Sci.— Second Sebtks, Vol. XXXIV, No. 100.— July, 1862. 



