154 University of California Puhlications in Zoology. [Vol.8 



beside those taken in 50 fathoms. It is probable, therefore, that 

 the species occurs mainly in the mesoplankton or lower epi- 

 plankton. 



Distrihution of S. planTitonis 



Of the 36 specimens obtained, two were taken from the sur- 

 face, six with horizontal closing nets, 15 with vertical closing 

 nets, and 13 with open vertical nets. All data concerning this 

 species are given in the following table. 



These data indicate that this species occurs mainly below 100 

 fathoms, although at times it is found on the surface. We may 



