Stylonurus excelsior Hall 
Page 292 
See plate 47 
1 Photograph of a cast from the original intaglio. The small pores are 
imperfections of the cast. The inner circular depressions represent 
the ocular nodes with the smooth crescentic visual areas on the outer 
edge. These are buttressed by strong orbital ridges which have 
been made conspicuous by the compression of the adjoining test. 
Natural size 
Horizon and locality. Catskill beds. Andes, Delaware co., N. Y. 
The original is in the geological museum of Rutgers College, New Bruns- 
wick, N. J. 
536 
