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NEW YORK STATE MUSEUM
| *E. lacustris var. pachychirus Hall | |
| *E. maria Clarke | |
| *E. megalops nov. | |
| *E. microphthalmus Hall | |
| *E. pittsfordensis Sarle | |
| *E. pristinus nov. | |
| *E. prominens Hall & Clarke | |
| *E. pustulosus Hall | |
| E. ranilarva nov. | |
| *E. ?(Dolichopterus ?) stellatus nov. |
Subgenus onychopterus
| E. kokomoensis Miller & Gurley |
Subgenus tylopterus
| E. boylei Whiteaves |
Subgenus anthraconectes
| Type: | E. mansfieldi C. E. Hall |
| E. mazonensis Meek & Worthen | |
| E. pennsylvanicus C. E. Hall | |
| E. stylus Hall | |
| Doubtful species | |
| E. ? potens Hall | |
| E. ? pulicaris Salter |
? Genus eurypterella Matthew
| ? E. ornata Matthew |
Genus eusarcus Grote & Pitt
| Type: | *E. scorpionis Grote & Pitt |
| *E. ? cicerops Clarke | |
| *E. ? longiceps nov. | |
| E. newlini (Claypole) | |
| *E. triangulatus nov. |
