44 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I49 



dormant during the winter and therefore would not offer any 

 resistance to burial. Station 74 was sampled in March 1962 and 

 stations 101-109 were sampled in September 1962. If the Foramini- 

 fera were dormant during this period then they certainly would be 

 expected to become buried by the activities of the worms. On the 

 other hand, even if they were active, it is likely that they would 

 become buried by the activities of relatively much larger animals. 

 If the benthonic Foraminifera in L.I.S. are truly epifaunal, then 

 only these Foraminifera would survive and reproduce that were 

 fortunate enough to remain on or be brought back to the surface. 

 The alternative possibility is that the Foraminifera in L.I.S. are 

 infaunal rather than epifaunal animals. Actually the sediment- water 

 interface is not a sharp boundary in the soft muds of L.I.S. and so 

 the terms epifaunal vs. infaunal at the interface are inexact. How- 

 ever, it must be remembered that living foraminifers were found 4 

 centimeters down in the cores. 



Cytological investigations on a seasonal basis must be carried out 

 in order to find out whether or not the foraminifers beneath the 

 surface are feeding and reproducing. Since such investigations are 

 beyond the scope of the present study, the answer must await further 

 research. 



Particle-Size Analyses 



Particle-size analyses were made on 59 samples using the standard 

 methods of analysis described by Krumbein and Pettijohn (1938). 

 The phi notation of Krumbein (1934) was used for the class limits 

 where (j> = — log 2 of the diameter in millimeters. The results of each 

 analysis were plotted on probability paper, and four of the statistical 

 measures described by Inman (1952) were tabulated. These meas- 

 ures are: The phi median diameter (Md<£), phi mean diameter 

 (M</>), phi deviation (or<£), and phi skewness (o.<j>). They are defined 

 as follows : 



Md£=4>50 

 M*=i(*16+$84) 



o-<£=i(<£84-4>16) 



OL<p 



a<f> 

 where <j>50, <f>84, and </>16 are percentiles. Table 11 (page 84) shows 

 the results of the analyses. The letter a after each station number 

 indicates that the second centimeter of core was used for the analysis. 

 Stations 98, 56, 57, and 58 are exceptions. 



