PLANKTON OF THE GULF OF MAINE 
183 
1911). It seems not to enter the Baltic, probably being barred therefrom by low 
salinity. It is recorded from the Indian Ocean, doubtfully from the Pacific (Gies- 
brecht and Schmeil, 1898), and from the Black Sea (van Breemen, 1908). Off the 
Fig. 62. — Occurrence of the copepods Mtidius armaius and Candacia armata. x, locality records for Mtidius armatus: 
locality records for Candacia armata. The hatched curve incloses the zone where tropical-oceanic species occur most 
frequently 
North American seaboard it has been reported from the Gulf of St. Lawrence (T. 
Scott, 1905; Herdman, Thompson, and Scott, 1898; and Willey, 1919); off Halifax 
and Shelburne, Nova Scotia (Willey, 1919); at many localities in the Gulf of Maine; 
