One or two stragglers, notably Eurypterus remipes, return in the Rondout waterlime in greatly diminished number, and a new peculiar type of Eurypterus (E. microphthalmus) appears in waterlime intercalations of the Manlius limestone above.[1]
The North American Devonic has furnished but scanty remains of Pterygotus in the Dalhousie formation of New Brunswick,[2] the Gaspé
- ↑ To show the more exact position of the Eurypterus-bearing beds in the entire succession of the Siluric, this briefer tabulation is appended, in which a descending order is followed. The productive beds are in italics.
devonic Helderbergian 
Manlius 
Rondout Cobleskill Bertie Camillus Salina 
Salt Upper Siluric 
Vernon 
Pittsford-Shawangunk
Guelph Niagaran Lockport-Noblesville Rochester Clinton Medina-Richmond Lower Siluric 
Frankfort 
Utica - ↑ Clarke, N. Y. State Mus. Mem. 9,2: 18, 1909. The diminutive Eurypterus? pulicaris Salter and Eurypterella ornata Matthew from the Devonic rocks of New Brunswick are so little known and their eurypterid nature so doubtful that they are here left out of consideration.
the limulids to find the smaller and younger forms in the shallower shore waters, where there might be laid down with their remains the drifted fragments of larger individuals such as are indicated by the great Pterygotus segment and the large carapace of E. remipes, elsewhere figured. While E. remipes seems to have strayed farthest beyond the bounds of its lagoon, yet both pools were really quite restricted and today the most productive part of the Buffalo pool seems to have been removed by the quarrying operations of the Buffalo Cement Company.
