THE EURYPTERIDA OF NEW YORK 93 
One or two stragglers notably Eurypterus remipes, return 
in the Rondout waterlime in greatly diminished number, and a new pecu- 
liar type of Eurypterus (E. microphthalmus) appears in water- 
lime intercalations of the Manlius limestone above.' 
The North American Devonic has furnished but scanty remains of 
Pterygotus in the Dalhousie formation of New Brunswick,’ the Gaspé 
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 far- 
thest 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. 
'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 
Bertte 
Camillus 
Salt 
Vernon 
Puttsford-Shawangunk 
Salina 
Upper Situric 
Guelph 
Lockport-Noblesville 
Rochester 
Clinton 
Medina-Richmond 
Frankfort 
Niagaran 
Lower 
Siluric 
Utica 
2 Clarke, N. Y. State Mus. Mem.o9,2: 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. 
