The Eurypterida of New York/Volume 2/Explanations of plates/Plate 12
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PLATE 12
Eurypterus lacustris Harlan
Page 173
See plates 9–11, 13
| 1 | Chelicera. × 3 |
| 2 | Anterior portion of a female opercular appendage, showing the two tubular lateral appendages, the test of the operculum being broken away. × 2 |
Eurypterus lacustris var. pachychirus Hall
Page 179
See plate 19, figure 1
| 3 | Hall's original in Palaeontology of N. Y., v. 3, pl. 82, fig. 1. The abdomen is somewhat distended and the sculpturing well shown. |
The figures are from photographs. All specimens are from the Bertie waterlime at Buffalo, Erie co., N. Y. The originals of figures 1 and 2 are in the museum of the Buffalo Society of Natural Sciences, that of figure 3 in the State Museum
| Memoir 14. N.Y.State Museum. | Plate 12. |
 | |
| J.A.Glenn phot. | J.B.Lyon Co. State Printer. |