23 



areas where currents prevail, sometimes in Chaetopterus 

 beds, or in rocky shaley pockets. However, off Santa 

 Rosa Island (Station 3505-55) it occurs in a flourishing 

 aggregate of large individuals that has not been found 

 at any other locality, A conspicuous bed of Lacqueus 

 calif ornicus (brachiopod) is believed to be present along 

 a rocky shelf off Empire Landing, on the leeward side 

 of Santa Catalina Island, in less than 40 fathomso Its 

 occurrence in other areas is noted only as scattered 

 small clusters or individuals, usually with one or a few 

 valves of another brachiopod, Terebratalia transversa , 

 in rocky outcrops of similar depths. It seems possible 

 that these and other unique aggregations survive through 

 periods of years, and that they have biological properties 

 which encourage the settling of new stocks to insure 

 existence through successive generations. At any rate, 

 it must be assumed that there is no sparsity of larval 

 or settling stocks in other more distant areas. 



Systematic Classification of Faunal Units in Santa Monica Bay 



Any scheme of classification must ultimately be 

 by systematic categories so that each species will have 

 a binomial name which can be recognized by other scientists. 

 Its place in the phylogenetic scale will then be established. 

 In Santa Monica Bay, as well as most of southern California, 

 this is a problem of the greatest magnitude because many 

 of the animals (including some economically important ones) 



