Stylonurus cestrotus Clarke 
Page 288 
See plate 49 
1 Carapace showing distinctly the extent of the visual areas which are 
broken out, and the ocellar mound. x 3 
2 Carapace showing the frontal tumescence and large ocellar mound. x 3 
3 Carapace showing surface ornamentation. The doublure has become 
separated on the left side. x 3 
4, 5, 6 Carapaces illustrating the great variation in outline due to different 
directions of compression. X 3 
7 Portion of a grooved leg, probably belonging to this species. Natural size 
Hortzon and locality. Shawangunk grit. Otisville, Orange co., N. Y. 
Stylonurus sp. 
8 Fragment of leg, probably referable to Stylonurus, subgenus Ctenopterus. 
& 3 
Horizon and locality. Shawangunk grit. Otisville, Orange, co., N. Y. 
Stylonurus multispinosus nov. 
Page 2097 
g Distal portion of leg. Natural size 
1o Group of first and third endognathites, and a sternite 
Horizon and locality. Pittsford shale. Pittsford, Monroe co., N. Y. 
The originals of all figures are in the State Museum 
540 
