130 



BULLETIN OF THE BUREAU OF FISHERIES 



CRUSTACEANS 



Adult decapods 



The Gulf of Maine supports a host of decapods — that is, crabs, shrimps, and 

 lobsters — the larval stages of which often swarm in the plankton, most often along 



Fig. 46.— Locality records for oceanic pteropods and heteropods. • , one species; ®, 10 or more species 



shore, as noted elsewhere (p. 34). The adults of nearly all of them live on the 

 bottom, except when some of the shrimps make brief swimming excursions upward 

 when disturbed, as, for instance, by the passage of the bottom net or trawl, or when 



