124 University of California Publications in Zoology [Vol. 11 



Should the reader exhaustively analyze table 13 with respect 

 to this difference between the two locations he would realize that 

 this appearance is probably not due to chance but to a definite 

 correlation. It is, however, another matter to discover its 

 significance. If this appearance be due to the distance from land 

 then it would be legitimate to conclude that 8. californica is 

 mainly an oceanic species. On the other hand, S. enflata accom- 

 panied S. californica in nearly every haul and, as pointed out 

 elsewhere (1911, p. 156), this may mean the occurrence of a 

 tropical current, in which event we should expect the species to 

 occur more abundantly nearer the current and therefore possibly 

 farther from the coast. Had the investigations been extended 

 over ten or fifteen stations at increasing distances from land some 

 clue to the significance of this correlation would doubtless have 

 been discovered, but as the matter now stands it seems un- 

 justifiable to do more than point out these two possibilities. 



Scripps Institution for Biological Research of the 



University of California, La Jolla, California. 



Transmitted September J, 1912. 



