1911] Michael: ('haetogiiafha of tJie San Diego Region. 153 

 DISTRIBUTION OF OTHER SPECIES 



Distribution of S. hexaptera 



Of 28 specimens obtained, 11 were taken from the surface, 

 five with horizontal closing nets, three with vertical closing nets, 

 and nine with open vertical nets. All our data concerning the 

 distribution of these specimens are given in the following table. 



TABLE 61 

 Data concerning the Distribution of S. hexaptera. 



From these data we see that this species is irregularly dis- 

 tributed. So few specimens were obtained that it is difficult to 

 tell whether it typically occurs in the mesoplankton or not. 

 However, excepting at the surface it has not been obtained above 

 45 fathoms, and even those from the surface when expressed in 

 terms of number per 10 hours of hauling become insignificant 



