46 



U.S. NATIONAL MUSEUM BULLETIN 258 



Table 33. — Numbers of species in diversified genera and families in the intertidal 

 faunas of several regions of the world. 



Names of genus or group 



Japan- Plymouth- Atlantic 



California Magellan Okhotsk Tropics Man France 



Table 34. — List of world intertidal gammaridean genera in the region of 90° N 

 to 40° S. The following families are not included because their members occur 

 primarily on soft-bottoms, in pelagic waters, or as epibionts: Acanthonotozo- 

 matidae, Ampeliscidae, Haustoriidae, most genera of Lysianassidae, Oedicero- 

 tidae, Pardaliscidae, Paramphithoidae, Phoxocephalidae, Stegocephalidae, 

 Stilipedidae, Synopiidae (=Tironidae), Talitridae (beachhoppers) . Endemic 

 Californian genera are marked with asterisks. 



