38 DESCRIPTION OP NEW 



Unio follicdlatus. Plate XL fig. 33. 



Testa angusto-elliptica, transversissimd, valdi in(squilaterd, postici subbiangulatd ; an- 

 tic'^ rotundala ; ad latera planulata ; valvulis subtenuibus ; nalibus vix prominuUs ; epider- 

 mide tenebroso-fuscd ; dentibus cardinalibus parvis ; lateralibus longis subcurvisque ; mar- 

 garild purpured et iridescente. 



Shell narrow-elliptical, very transverse, very inequilateral, behind subbiangular, 

 before rounded, flattened at the side ; valves rather thin ; beaks scarcely prominent ; 

 epidermis dark brown; cardinal teeth small; lateral teeth long and somewhat curved ; 

 nacre purple and iridescent. 



Hab. Savannah River. Major Leconte. 



My Cabinet. 



Cabinet of Major Leconte. 



Diam. '5, Length "8, Breadth 2*4 inches. 



Shell narrow-elliptical, very transverse, very inequilateral, subbi- 

 angular behind, rounded before, rather compressed, flattened at the 

 side ; substance of the shell rather thin ; beaks scarcely prominent ; 

 ligament long and curved; epidermis very dark brown; cardinal teeth 

 small and lobed ; lateral teeth long and somewhat curved ; anterior 

 cicatrices distinct ; posterior cicatrices confluent ; dorsal cicatrices in 

 the centre of the cavity of the beaks; cavity of the shell small; cavity 

 of the beak very small ; nacre purple and iridescent. 



Remarks. — I owe the possession of this species to Major Leconte, 

 whose active researches in the rivers of Georgia have produced us seve- 

 ral new Uniones. 



The folliculatus is a remarkably transverse shell, and seems to be- 

 long to that group of which the complanatus (Soland.) may be consi- 

 dered the type. It diverges towards the Shepardianus (nobis), but is 

 by no means so transverse a species. The only two specimens which 

 I have seen, are purple inside, which may be considered its general 

 colour. Like the complanatus, it may perhaps be found white and 

 salmon coloured. 



