| Country | USA |
| Locality | Delaware Bay |
| Ref. |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 111 | |||||||||||
| Remarks | |||||||||||
| In Delaware Bay, two 4-mm specimens were taken in July, 1960. In Rehoboth and Indian River bays, 2 juveniles 14 mm and 19 mm were collected in November 1968 (Ref. 40809). | |||||||||||