82 



Mr. T. Davidson on Waldheimia venosa. 



clay underlies the sand, in which anchors hold very firmly. 

 Many small Serjmlce are attached to its surface; and a long piece 

 of sea-weed, two feet in length, was found growing from near 

 its hinge. 



On opening the box containing this interesting specimen (of 

 which two correct drawings are here appended), I at once per- 

 ceived that the shell was no other than an extremely large ex- 



=i\ 



""^z 



]\ aldheimia venosa, Solander, sp. 

 (Falklaufl Islands, and Collection of Rear-Admiral B. J. Sulivan.) 



