4 
Ww ND 
Pterygotus buffaloensis Pohlman 
Page 358 
See plates 57, 67, 68; 72-76; 78-80 
Interior view of carapace showing very distinctly the facettae of the 
lateral or compound eyes [see fig. 2]; also the ornamentation of the 
coxal joint. Natural size 
Enlargement (x 3) of one of the eyes 
Pincers of chelicera. Original of text figure 1425 in Zittel-Eastman’'s 
Textbook of Paleontology. Natural size 
Another pair of pincers or chelae showing a complete fixed chela. Nat- 
ural size 
Telson; of type of ‘““P. acuticaudatus” Pohlman. Natural size 
Pterygotus cobbi Hall 
Page 371 
Free pincer or chela of chelicera. Cotype of P. cummingsi Grote 
& Pitt [fig. p. 301, Am. Ass’n Adv. Sci. Proc., v. 26, 1878]. Natural 
size 
Horizon and locality. Bertie waterlime. Buffalo, N. Y. 
All figures are from photographs. 
The originals of figures 1-3 and 5 are in the State Museum, those of 
figures 4 and 6 in the museum of the Buffalo Society of Natural Sciences 
594 
