Isognomon bicolor (C. B. Adams, 1845) Bicolor Purse-oyster

Isognomon bicolor (C. B. Adams, 1845) Bicolor Purse-oyster
Soldier Key, Bicayne Bay, Miami-Dade Co., Florida (20 and 16 mm.)
Isognomon bicolor (C. B. Adams, 1845) Bicolor Purse-oyster
On jetty rock, north side if Ponce inlet 8/6/2007 (16.6 mm.) | Digital images by Joel Wooster