Eurypterus pustulosus Hall 
Page 2or 
See plate 23 
1 Interior view of postabdomen, lacking the last segment. Original of 
Pterygotus globicaudatus Pohlman. Natural size 
2 Enlargement of anterior portion of a carapace, reproduced in plate 23, 
figure 1, showing character of ornamentation and margin. Ocellar 
mound with traces of ocelli in lower left corner. x 3. 
3 Enlargement of posterior portion of the same carapace, to show character 
of ornamentation. Ocellar mound in front. x 3 
4 Enlargement of portion of specimen represented in figure 1 to show 
character of scales on tergite 
Horizon and locality. Bertie waterlime. Buffalo, N. Y. . 
All figures are from photographs, of which the originals are in the museum 
of the Buffalo Society of Natural Sciences 
488 
