Collecting site
Biscayne Bay, Florida, USA
latitude: 25.566     25°33'57.6"N
longitude: -80.217003     80°13'1.21"W
[Precision of location: Alexandria Digital Library (with USGS GNIS data)] 
[Site Named Here by name of island, bay, strait, lake, river, or stream, etc., named in source publication] 
Collected here:
| Thysanozoon nigrum Girard, 1851 | 1951 or earlier |  |  | collected by F.M. Bayer, USNM in Biscayne Bay. | 
| Pseudoceros crozieri Hyman, 1939 | 1951 or earlier |  |  | collected by F.M. Bayer, USNM in Biscayne Bay. | 
| Thysanozoon brocchii (Risso, 1818) | Jan 26, 1951 |  | stones | collected under stones by F.M. Bayer, USNM along the County Causeway,  Biscayne Bay. | 
| Notoplana insularis Hyman, 1939 | Aug 1, 1951 |  |  | Collected by F.M. Bayer. | 
| Acerotisa multicelis Hyman, 1955 | Aug 1, 1951 |  |  | Two preserved specimens by F.M. Bayer in the Biscayne Bay region of Florida. |