Hughmilleria shawangunk Clarke 
Page 342 
See plates 64-66 
Carapace showing normal outline and eyes. x 3 
Horizon and locality. Shawangunk grit. Otisville, Orange co., N. Y. 
Pterygotus macrophthalmus Hall 
Page 350 
See plates 72-73 
A nearly complete specimen showing the dorsal view of the preabdomen 
and postabdomen, the latter distended and exhibiting the membrane 
connecting the joints; and the telson. Natural size 
Horizon and locality. Bertie waterlime. Cranes Corners, Herkimer co., 
N. Y. 
A young specimen showing the relatively greater size of the compound 
eyes and ocellar mound. Natural size 
Horizon and locality. Bertie waterlime. Marshall, Oneida co., N. Y. 
Dorsal view of three tergites and postabdomen showing the marginal 
serrations of the ultimate segment and the median carina. Natural 
size 
Horizon and locality. Bertie waterlime. Oneida co., N. Y. 
Young carapace preserving well the outline of the carapace, the form 
and prominence of the compound eyes and the ocellar mound. x 2 
Larger carapace. Natural size 
Specimen showing the carapace, three tergites and swimming legs. 
Natural size 
Hortzon and locality. Bertie waterlime. Cranes Corners, Herkimer co., 
N. Y. : 
All figures are from photographs. The originals of figures 1, 2, 5, 
6, 7 are in the State Museum, those of figures 3 and 4 are in the 
American Museum of Natural History 
578 
