PLATE 81 A. 
Fig.l. 
1 . 
Page 
Eurypterus eacustris. 407 * 
A large individual which is deprived of the appendages, except one dismembered swim¬ 
ming foot. The specimen is compressed, and the little pustule-like scales have the ap¬ 
pearance of pores in the crust. [ These have been very incorrectly represented in the 
drawing; there being hut two rows, and these not parallel, on the six posterior joints, 
while the six rows are but indistinctly visible on a few of the thoracic segments.] 
Individuals of this species frequently attain a larger size than this, as seen in other 
figures. 
