40 DESCRIPTION OF NEW 



Unio Lecontianus. Plate XII. fig. 35. 



Testa elliptica, transversa, incequilaterali, subinjlatd ; valvulis crassis ; dentibus cardinali- 

 bus parvis; lateralibus longis, U cardinalibus separatis; margarita salmonis colore tincta. 



Shell elliptical, transverse, inequilateral, somewhat inflated ; valves lliick; cardinal 

 teeth small; lateral teeth long, being separated from the cardinal teeth ; nacre salmon 

 colour. 



Hab. Conoochee River, Georgia. Major Leconte. 



My Cabinet. 



Cabinet of Major Leconte. 



Diam. 1-2, Length 1-7, Breadth 2-S inches. 



Shell elhptical, transverse, inequilateral, subbiangular behind, some- 

 what inflated ; substance of the shell thick ; beaks slightly elevated ; 

 ligament rather short; epidermis yellowish brou^n and obscurely ray- 

 ed; cardinal teeth small and deeply cleft in the left valve : lateral 

 teeth long, enlarged at the posterior end, and separated from the car- 

 dinal teeth; anterior cicatrices distinct; posterior cicatrices confluent; 

 dorsal cicatrices situated on the plate between the cardinal and lateral 

 teeth ; cavity of the shell somewhat deep and rounded ; cavity of the 

 beak small ; nacre salmon colour, approaching to white. 



Remarks. — Among many other shells from Georgia, which I owe 

 to the kindness of my friend, Major Leconte, I found this species, 

 which I believe has not been before described. It is with great plea- 

 sure I dedicate it to him. The Lecontianus perhaps most resembles 

 the crassidens (Lam.), cuneatiis (Barnes). It is not so large a shell, 

 and the beak is more medial. The young specimens have distinct 

 rays, and their epidermis is quite yelbw. In this state they resemble 

 somewhat the young of crassus (Say). The nacre of all the specimens 

 I have seen is salmon colour, and salmon running into white or pur- 

 ple. None of the beaks were sufficiently perfect to observe the form 

 of undulations. 



