richmond group
Megalograptus welchi Miller. Liberty beds, Warren county, Ohio
Upper Siluric (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 Miller & Gurley
Eusarcus newlini (Claypole)
Drepanopterus longicaudatus nov.
guelph dolomite
Eurypterus (Tylopterus) boylei Whiteaves. 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[1]
Otisville, Orange co., N. Y.
Eurypterus maria Clarke
Eusarcus? cicerops Clarke
- ↑ Since this memoir went to press information has been received of new occurrences 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
