378 Miscellanies. 
and we trust it will not be unknown or unappreciated in Europe. 
While we shall always cherish with gratitude our early instructors, 
Jameson, Brongniart, Phillips, Hatiy, Brochant and Cleaveland, 
we are much gratified, as all these books are now out of print, that 
we can substitute so learned, so exact, so complete and so lucid a 
work as that of Mr. Shepard. 
32. New work by Prof. Brown of Heidelberg—Sharks teeth— 
Conrad on shells, &c. 
Extract of a letter from Lt. W. W. Mather, dated West Point, June 11th, 1835. 
To tue Eviror— Dear Sir—Prof. Brown desires that you would 
notice in the Journal, a work of his now publishing, entitled Lethea 
Geognostica, or descriptions and figures of the characteristic fossils 
of the different geological formations of both continents. The two 
first numbers have been forwarded to me, but have not yet arrived. 
A work of this kind is a desideratum with every practical geologist. 
| Prof. Brown says that the fossil teeth from the mar! 
pits of New, Jersey of the following forms, 
are the Squalus raphiodon of Agassiz, 
rap “ ‘¢  pristodontes “ “ 
and both belong to the chalk formation ; thus offering an addition to 
the mass of evidence in support of Dr. Morton’s views of the geo- 
logical character of the New Jersey marls. Mr. Conrad’s work on 
fossil shells is more appreciated in Europe than in this country, and it 
is to be hoped that he will persevere through all difficulties and con- 
tinue it. Itis very highly spoken of in some of the foreign pe- 
riodicals. 
Prof. Brown in his letter remarks, “Il serait fort dommage, St 
le travail de M. Conrad ne seroit pas continué, parceque cest seule- 
ment par de semblables entreprises, que nous parviendrai a comparer 
parfaitement les Faunes et Flores fossiles des deux continents. Je 
me suis fait un devoir, de l’analyzer, et de le recommender dans no- 
tre Journal de Geologie.” 
33. A comprehensive system of Modern Geography and History, 
revised and enlarged from the London edition of Pinnock’s modern 
