site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | |
---|---|---|---|---|---|---|---|---|---|
A | Dionis Beach, Nantucket Island, Massachusetts, USA | 1823 map | late 1960 s | type locality | low intertidal | AMNH No. 937. | Riser NW (1981): 145 | ||
B | north shore of Massachusetts Bay, Massachusetts, USA | 1816 map | late 1960 s | 6 m | AMNH No. 937. | Riser NW (1981): 145 | |||
C | Massachusetts Coast, USA | 1471 map | late 1960 s | low intertidal | collected from a number of beaches in Massachusetts. | Riser NW (1981): 145 |