PLANKTON OP THE GULP OP MAINE 
343 
The young medusas of Staurophora appear off Cape Cod and probably else- 
where along the coast farther north during the last half of April. 87 In 1920, for 
Fig. 95.— Occurrence of the hydromedusa Melicertum campanula, and of the ctenophore Bolinopsis infundibulum. X. 
locality for Melicertum; 9, locality records for Bolinopsis 
example, we noted them first off the northern end of Cape Cod on the 17th of that 
month (station 20117) and found the tiny medusae (about 5 to 15 millimeters in 
diameter) plentiful on the surface in Massachusetts Bay on the 20th (station 20119). 
87 According to Mayer (1910) this takes place early in the month, but such has not been our own experience. 
