178 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 18 



and ecology are taken into account. In this way, systematics would 

 cease to be a "pigeon-holing" science. 



One problem emerging from the New Systematics is that the 

 worker must use an insight and intuition, based on a broad education 

 and experience in several disciplines, in order to compensate for his 

 inability to study the life-history, genetics, zoogeography and other 

 properties of each species he attempts to classify. Micro-ecological 

 isolation is difficult to study and marine faunas are too poorly known 

 to be able to distinguish geographic races from ecophenotypes. Thus, 

 the differences between two closely related populations cannot always 

 be accurately denoted species, subspecies, phenotypes, hybrids, or eco- 

 phenotypes. 



The writer has made every effort to segregate entities at the 

 specific level, so that each category is more or less of the same rank. 

 Whatever success he has had in this undertaking has been due largely 

 to the vast amount of material examined over a long period of time. 

 Many aberrations, often described by zoologists as distinct species, 

 have been clearly discerned as phenotypes, hybrids or ecophenotypes. 

 Doubtless, there remains room for discussion of some of the species com- 

 plexes, particularly the EPISTOMUS-LUCUBRANS-ABRONIUS- 

 DABOIUS-STENODES complex of the genus Paraphoxus. However, 

 the separation of this complex into species units has been done repeatedly 

 by me with less than 5 % occurrence of intergradation in more than 700 

 samples, thus suggesting that these populations have distinct genetic 

 (physiological) barriers. There is the possibility that these populations 

 are phenotypes or ecophenotypes. If this approach is considered it 

 would be one of the most entertaining and significant studies which 

 could be undertaken by a genetical ecologist. 



STATION RECORDS 



None of the species is provided with a list of the stations at 

 which it occurs, for such lists would consume a large number of printed 

 pages, unnecessarily. A card file of these has been deposited at the 

 Allan Hancock Foundation, and a brief summary of such records 

 printed herein. A more detailed account of the quantitative ecology of 

 all benthic amphipods in southern California is in preparation, wherein 

 will be found more precise distributional data. 



In reference to data for type localities, the original information 

 may be found in the following publications: Fraser 1943, Hartman 



