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BULLETIN OF THE BUREAU OF FISHERIES 
Fig. 94.— Occurrence of the worms Tomopteris catharina and T. septentrionalis . O- locality records for large T. catharina, 
Jujy and August; X for young T. catharina, July and August; O. for large T. catharina, March to May; A, for T. 
septentrionalis, March to May. The hatched curve includes the parts of the Gulf of Maine where T. catharina has been 
taken in summer 
actually neritic (witness its rarity or absence under estuarine conditions), T. catha- 
rina is clearly a creature of the coastwise waters, as it occurs within the limits of 
the Gulf of Maine. 
