Pterygotus buffaloensis Pohlman 
Page 358 
See plates 57, 67, 68; 72—79 
1 Enlargement (x 3) of segments to show the pore system of the integu- 
ment [see p. 29], seen in front of the posterior margins. Natural size 
Hortzon and locality. Bertie waterlime. Buffalo, N. Y. 
Photograph, the original of which is in the museum of the Buffalo Society 
of Natural Sciences (no. 100) 
600 
