PLATE 82 . 
Page 
Fig. 1. Eurypterus dekayi. 411* 
1. An individual, natural size, with the dorsal side upwards. One side has been broken off; 
and this portion, with the swimming foot, is restored in outline, the same organ on the 
left side being essentially entire. The upper part of the carapace and the first joints are 
removed, so as to show the maxillary plates, the postoral plate and the bases of the an¬ 
terior feet, which are broken off so as not to extend beyond the margin of the carapace. 
The thoracic appendage is shown in its junction with the first ventral joint, and extending 
to the base of the fourth joint. 
