AND OTHER FAMILIES. 217 



My Cabinet. 

 Cabinet of Professor Benedict, Burlington, Vermont. 

 Diam. 1-4, Length 2-2, Breadth 3-6 inches. 



Shell trapezoidal, inequilateral, transverse, rather compressed, nearly 

 straight on the dorsal margin ; substance of the shell very thin ; epi- 

 dermis shining, yellowish olive, vv^ith rather strong lines of growth ; 

 beaks somewhat prominent and granulate at tip ; cicatrices scarcely 

 perceptible; cavity of the beaks shallow; cavity of the disk rather shal- 

 low ; nacre bluish white and iridescent. 



Remarks. — On my way to Quebec, in the summer of 1829, 1 spent 

 a few minutes on the shore of lake Champlain, nearly opposite to fort 

 Ticonderoga, waiting for the steamboat. These minutes were im- 

 proved in the search of the shells near the edge of the water. Among 

 others hastily seized, was a single individual of the present species, 

 which, though an alive specimen, was much decorticated. Unwilling 

 to describe it as a new species, without better individuals for examina- 

 tion, I have endeavoured in vain to procure them until the present 

 time. I owe to the kindness of professor Benedict a suite of different 

 ages which verify my previous impression, and to him I dedicate the 

 species. In outline (except the wings) it resembles the Symphynota 

 bi-alata (nobis). It is not, however, so large or so thick a shell, and 

 has neither tooth nor undulations. 



Anodonta Burroughiana. Plate XVI. fig. 49. 



Testd ovatd, valde inxquilaterali, siibinflatd ; valvulis tenuibus ; natibus pro- 

 minulis ; lined dorsali curvd ; margaritd purpured. 



Shell ovale, very inequilateral, slightly inflated ; valves thin ; beaks slightly elevated; 

 dorsal line curved ; nacre purple. 



Hab. Island of Luconia, near Manilla. Dr Burrough. 



My Cabinet. 

 Cabinet of Dr Burrough. 

 57 



