Pterygotus buffaloensis Pohlman 
Page 358 
See plates 57, 67, 68, 72-77, 79-80 
1 Metastoma showing the ornamentation. Natural size 
2 Swimming leg. Pohlman’s type of P. buffaloensis. Natural 
size 
3 Interior view of ventral side. Shows doublure of metastoma with edge 
of connecting membrane (as dark concentric ring), which held it in 
place, operculum with male genital appendage (sagittate plate between 
metastoma and chelicera) and the two chelicerae, each bent at the 
first articulation and indicating the possible amount of reflexion. | 
Natural size 
4 Endostoma (plate chiseled out in middle of metastoma’ which was 
attached to a metastoma and has become reversed. Natural size 
Horizon and locality. Bertie waterlime. Buffalo, N. Y. 
All figures are from photographs. 
Originals of figures 1 and 4 are in the State Museum; those of figures 2 
and 3 are in the museum of the Buffalo Society of Natural Sciences 
596 
