THE EURYPTERIDA OF NEW YORK 87 
RICHMOND GROUP 
Megalograptus welchi Miller. Liberty beds, Warren county, Ohio 
Upper Silurtic (Ontaric) 
CLINTON BEDS 
Eurypterus prominens Hall & Clarke. Clinton sandstone, Cayuga county, N.Y. 
E. sp. Arisaig, Nova Scotia 
LOCKPORT LIMESTONE (Noblesville dolomite) 
Kokomo, Indiana 
Eurypterus ranilarva nov. 
E. (Onychopterus) kokomoensis Muller & Gurley 
Eusarcus newlini (Claypole) 
Drepanopterus longicaudatus nov. 
GUELPH DOLOMITE 
Eurypterus (Tylopterus) boylei Whzteaves. Elora, Ontario 
PITTSFORD SHALE 
| Pittsford, Monroe co., N. Y. 
Eurypterus pittsfordensis Sarle | 
Stylonurus (Ctenopterus) multispinosus nov. 
Hughmilleria socialis Sarle 
H. socialis var. robusta Sarle 
Pterygotus monroensis Sarle 
SHAWANGUNK GRIT! 
Otisville, Orange co., N. Y. 
Eurypterus maria Clarke 
Eusarcus? cicerops Clarke 
. 1 Since this memcir went to press information has been received of new occur- 
rences of eurypterids in the Upper Siluric of Pennsylvania and Maryland which we 
have been able to investigate by the favor of Dr Ulrich and Mr Jesse E. Hyde. 
One specimen, collected by Mr Billingsley at the Delaware Water Gap, is a slab 
