212 
Psyche 
[September-December 
Fig. 1 . Log frequency distribution and regression for the six paussid species 
trapped. 
The log frequency was plotted, together with the calculated regres- 
sion (Fig. 1). That the six species have a logarithmic distribution 
pattern can be seen by inspection. 
The total catch (all species) for each sampling period is shown, 
together with the catches of the three most frequent species (Fig. 2). 
It would appear spinicoxis, sphaerocerus and cilipes frequencies are 
varying in parallel. The figures for these three species and the next 
most abundant, setosus, were tested for the significance of this ap- 
parent correlation by Kendall’s coefficient of concordance (Siegel, 
1956). The results: 
n (number of sampling classes) = 20 
K (number of species) = 4 
W = 0.66 
X = 50.22 
df = 19 
/?< 0.001 
There is a highly significant correlation in the periodic trends in 
the four species, these accounting for 98.2 percent of the material 
caught (W was calculated uncorrected for ties; with a correction 
