FRESHWATER AND LAND SHELLS. 103 



Cordinuafion of Mr Lea's Paper. Read, January 5tk, 1838. 



Unio dolabr^formis. Plate XXIV. fig. 113. 



Tesla slliptica, injlata, inasquilaterali ; valvulis crassis ; natibus injiatis prominentibusque ; 

 epidermide Ic&vi; dentibus cardinalibus sublamellaiis ; later alibus longis lamellaiisque ; mar- 

 garita alba et iridescente. 



Shell elliptical, inflated, inequilateral; valves thick ; beaks inflated and prominent ; 

 epidermis smooth; cardinal teeth somewhat lamellar; lateral teeth long and lamellar; 

 nacre white and iridescent. 



Hab. Altamaha River, Liberty County, Georgia. Lewis Leconte, 

 Esq. 



Hab. Altamaha River, near Darien. Professor Ravenel. 



My Cabinet. 



Cabinet of Major Leconte. 



Cabinet of Professor Ravenel. 



Diam. 2-1, Length 3, Breadth 4-5 inches. 



Shell elliptical, injflated, inequilateral; substance of the shell thick, 

 thinner on the posterior portion; beaks inflated and prominent; liga- 

 ment rather short and very thick ; epidermis brown, finely wrinkled, 

 polished ; umbonial slope somewhat carinate, obscurely rayed ; car- 

 dinal teeth not very large, compressed ; lateral teeth long, lamellar, 

 curved, and separated from the cardinal teeth ; anterior cicatrices dis- 

 tinct ; posterior cicatrices confluent ; dorsal cicatrices very large, and 

 placed on the inside of the plate between the cardinal and lateral 

 teeth; cavity of the shell large and deep; cavity of the beaks large 

 and subangular; nacre pearly white, iridescent, sometimes pinkish in 

 the teeth and cavity of the beaks. 



Remarks. — There is a group of Uniones to which this belongs, 

 which have a close resemblance to each other in nearly all their cha- 

 racteristics. The U. ovatus (Say) may, be considered the type of this 



