224 NEW YORK STATE MUSEUM 
front of the head shield to that segment and then decreasing as gradually 
to the second postabdominal segment where a contraction to half the. 
width takes place. 
The carapace appears to have been subrectangular, rather short and 
broad; length to width in the approximate proportion of 3:5. The lateral 
Figures 50, 5 Eurypterus (Anthraconectes) mazonensis Meek & Worthen. 
Figure 50, copy of original figure; figure 51, outline sketch of counterpart of original, slightly 
reduced [see pl. 26, fig. 1] 
margins are slightly convergent, at least in the middle portion where they 
can be traced. The antelateral angles are somewhat abruptly rounded, 
the frontal margin transverse, slightly emarginate in the middle. At the 
postlateral angles the carapace is a little more broadened. The posterior 
margin is overlapped by the first tergite and not exposéd. The eyes are 
seen as rather small and slight kidney-shaped depressions; the right eye 
