vi PREFACE. 
ed a supplement to my fourth memoir, as well as some 
observations on Lamarck’s species of the Matades, (to be 
published in the Transactions of the American Philosophi- 
cal Society) I found myself sufficiently at leisure to take 
up the fossils from Claiborne, Alabama, which had been 
so long in my possession, and which had not before been 
described. The want of time alone had prevented an 
earlier attention to them. 
