50 



U.S. NATIONAL MUSEUM BULLETIN 258 



Table 35. — The presence and absence of northern and southern elements in 

 the amphipodan fauna of California. Genera marked with asterisks have 

 their northern or southern limits in the region between Monterey Bay and 

 La Jolla. Good representation indicates either a diversity of species or a high 

 frequency of individuals of a monotypic genus. 



