NO. 3564 HEMISQUILLA ENSIGERA—STEPHENSON 74 
Figure 1B shows that the Australasian population gives a skewed 
curve but the American an approximately normal curve. (This is 
the opposite of results shown in figure 14). Table 1 shows that the 
Australasian data vary more than the American. Differences between 
means are again significant with p < 0.001, and the populations are 
again statistically distinct. 
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@ SI B 
Figure 2.—Dimensions of Hemisquilla ensigera: a, rostrum; B, eye, lateral view; c, cornea, 
anteroventral view (l1=length, b=breadth, le=length of eye, ls=length of eyestalk; 
drawn from male, Queensland Mus. reg. no. W1779). 
RosTRAL PROPORTIONS.— This distinction was suggested initially by 
comparison of Australian specimens with Kemp’s figure (1913, pl. 7, 
fig. 84) of a Chilean specimen. 
All specimens were measured for lengths and breadths of rostrum 
and carapace lengths. Measuring rostral breadths caused occasional 
difficulty and basal breadths on the upper surface of the line of 
articulation with the carapace were measured in preference to maxi- 
