Miscellanies. A0L 
3. Description of New Fresh-water and Land Shells; by Isaac 
Lea.*—In the present paper Mr. Lea describes fifty four species of 
Unio, two of Margaritana, nine of Anadonta, one of Caracolla, one of 
Cyclostoma, and sixty of Melania, in all one hundred and twenty seven 
new species of land and fresh-water shells, described and figured by this 
indefatigable naturalist since the appearance of his last extended me- 
moir on this subject, on the appearance of which it was supposed that 
this prolific subject was exhausted ; as least so far, as that few new 
species of Naiades were to be looked for hereafter, and that future re- 
searches must bear mainly to the investigation of the anatomy and 
habits of the species already described. Some valuable light is thrown 
on this department of the subject in the present memoir, by the obser- 
vations of Mr. Thomas G. Lea of Cincinnati, brother to our author, 
carried on during the years 1838, ’9, and ’40, on some of the species 
in the Ohio River, particularly in reference to the times of their partu- 
rition, which he finds to differ very much in the different species. Mr. 
Lea has tabulated his observations made on at least twenty five different 
species during each of the four years, but it will require careful and 
long extended observations to arrive at valuable results. 
4. Graham’s Chemistry.t—Prof. Graham’s work is one of the best, if 
not the best, of all English text-books, on the difficult science of chem- 
istry, and is of such recent date as to embrace the latest discoveries. 
The appearance of a correct and amended American edition under the 
care of Dr. Bridges, will prove an acceptable thing to both teachers 
and students of chemistry in this country. 
MISCELLANIES. 
FOREIGN AND DOMESTIC. 
1. Fossil Fruits described by Dr. Gideon Algernon Mantell.—Dr. 
Mantell has recently read to the Geological Society of London, a 
memoir on three undescribed fossil fruits, from the chalk formation 
in the southeast of England. 
(1.) Zamia Sussexiensis—a cone belonging to a plant allied to the 
Zamia, and found associated with coniferous wood at Selmestown in Sus- 
* Transactions of the American Philosophical Society held at Philadelphia for 
promoting useful knowledge, Vol. VIII, new series, Part II, 1842. pp. 163-250, 4to. 
t Elements of Chemistry, including the applications of the science to the arts, 
with numerous illustrations ; by THos. Granam, F.R.S. Lond. & Ed., Professor 
of Chemistry, University College, London, &c. &c. With notes and additions, by 
Rogert Bripges, M.D. Philadelphia, Lea & Blanchard, 1843. pp. 749, 8vo. 
Vol. xiv, No. 2.—July-Sept. 1843. 51 
