' ~ 



CONTENTS. 



Plate 



XLV. 

 XLVI. 



XLVII. 



XLVIII, 

 XLIX. 



LI. 



Fig. 2, Unio bullatus. 

 Fig. 1, Unio stegarius. 

 Fig. 2, Unio dromas. 

 Fig. 1, Unio subtentus. 

 Fig. 2, Unio acutissimus. 

 Fig. 3, Unio conradius. 

 Unio interruptus. 

 Figs. 1, 2. Unio plexus. 

 Fig. 3, Unio heterodon. 

 Fig. 4, Unio lienosus. 

 Fig. 1, Unio stramineus. 

 Fig. 2, Unio patulus. 

 Fig. 1, Unio hembeli. 



NEW FRESH WATER SHELLS OF THE UNITED 

 STATES, &c. 



For sale by J. Dobson, a few copies of this work, which contains 

 coloured illustrations of bivalve and univalve shells, and embraces a 

 monography of the genus Anculotus. Most of the species described 

 in this book were obtained by the author in Alabama. 



NORTH AMERICAN HERPETOLOGY. 



Just Published, and for sale by J. Dobson, 108 Chesnut Street, 



NORTH AMERICAN HERPETOLOGY; +^' 



OR A DESCRIPTION OF THE 



REPTILES INHABITING THE UNITED STATES. 



BY JOHN EDWARDS HOLBROOK, M. D. 



Professor of Anatomy in the Medical College of the State of South Carolina, Member 



of the Royal Medical Society of Edinburgh, Corresponding Member of the 



Academy of Natural Sciences of Philadelphia, and of the New 



York and Baltimore Lyceums of Natural History. 



Vol. I. royal 4to, with splendid Coloured Plates. 

 This beautiful work will consist of four volumes, royal quarto, illus- 

 trated by numerous finely coloured plates— price $10 per volume. 



