Pterygotus buffaloensis Pohlman 
Page 358 
See plates 57, 67, 68, 72-78; 80 
1 The coxal joint of a swimming foot of a gigantic specimen, probably of 
this species. Type of P. cummingsi Grote & Pitt. Natural 
s1ze 
2 Metastoma of a large individual showing the ornamentation. Natural 
size 
Horizon and locality. Bertie waterlime. Buffalo, N. Y. 
Pterygotus atlanticus nov. 
Page 356 
3 Free chela, imperfect at both extremities. Natural size 
4 Gnathobase of coxa of swimming leg. The acute body resting upon it, 
is a fish spine. Natural size 
5 Fragment, apparently the posterior portion of a metastoma. Natural 
size 
Hortzon and locality. Dalhousie beds (Devonic). Campbellton, New 
Brunswick 
The originals of figures 1 and 2 are in the museum of the Buffalo Society 
of Natural Sciences, those of figures 3-5 in the Canadian Survey Col- 
lection at Ottawa 
598 
