History of Conchology in the United States. 167 
but this was years after the publication of his papers, and mean- 
_ while he had evidently forgotten many of the characters of his 
Own species; those who have worked most ardently in his cause, 
are therefore compelled to declare that they are unable to recon- 
cile some of his descriptions with Mr. Poulson’s shells bearing 
the same names. 
Mr. Conrad has described the shells collected by Lieut. Lynch’s 
Sea Expedition, and he also edited Part 7th (posthumous) 
of Say’s American Conchology. : 
We have purposely left till the last, in order to bring them to- 
gether, Mr. Doras most important publications—three of the 
most useful volumes on Conchology issued in America. They 
are all out of print, and are highly valued by those fortunate 
enough to possess copies. They consist of— 
1, “American Marine Conchology.” Philadelphia, 1831. 17 colored 
Plates. 8vo, pp. 72. 
is volume contains descriptions and figures of many of our 
common coast shells. The species, however, are different from 
Ose contained in the oA wide ad onchology” of Thomas Say. 
3. “Monograph of the Family Unionide, or Naiades of Lamarck, of 
30 Issued in 12 v0 numbers, 1835-38, and illustrated by 
informed of livin sie “on our Uniones. Although he earl 
are Geology hse life-time study, he has nevertheless oa 
a aa oy the species would be totally unrecognizable were 
or the acco ing plates. 
Awos Brxwzy. While Lea and Conrad worthily suoceeded 
re: Y, in the investication of the American Uniones, the late Dr. 
‘ Binney, of n, continued the labors of our first great 
Ter ist among the Terrestrial Gastero of country. 
the study of these interesting shells he devoted the leisure 
tents of his active life, for many years; and in his “Terres: 
