PLATE 8:J B. 
Page 
1. Eurypterus pustulosus. 418* 
1. The specimen, natural size. 
2. Eurypterus REM1PES. 404* 
2. The carapace and three articulations of the body of E. rcmipes, for comparison with the 
form of carapace of E. lacustris on same plate. 
3. Eurypterus lacustris. 407* 
3. The carapace of a large individual, showing the form to be distinct from tig. 2, which is 
the carapace of E. rernipes. 
4. 
Pterygotus cobbi. 
417* 
4. The free ramus of the chelate appendage of this species. 
