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96
FIELDIANA: GEOLOGY, VOLUME 12
| Specimen number | Width at base (a) mm. |
Width behind eyes (b) mm. |
Length (c) mm. |
Ratio a : c |
Condition |
| 5323/10 | 9.2 | . . . . | 6.2 | 6.7:10 | C |
| M 848 | 9.7 | 8.6 | 7.7 | 7.9:10 | C |
| 5323/25 | 11.3 | . . . . | 8.3 | 7.3:10 | C and dis. |
| 5323/11 | 11.8 | . . . . | 8.0 | 6.8:10 | C and dis. |
| M 836 | 12.0 est. | 11.0 est. | 8.0 est. | 6.7:10 | C |
| M 844 | 12.5 | 11.3 | 7.8 | 6.2:10 | C |
| M 881 | 13.0 | 11.0 | 7.5 | 5.8:10 | C |
| M 794 | 13.0 | 11.1 | 9.6 | 7.4:10 | C |
| 5323/9 | 13.2 | . . . . | 10.35 | 7.8:10 | C and und. |
| M 809 | 13.4 | 12.0 | 11.6 | 8.6:10 | C and dis. |
| 12306¹ | 13.5 | . . . . | 10.0 | 7.4:10 | C and und. |
| 5323/1 | 14.0 est. | . . . . | 10.0 | 7.1:10 | C |
| M 828 | 14.5 | 11.5 | 11.5 | 7.9:10 | C |
| M 840 | 14.5 | 13.0 est. | 12.4 | 8.5:10 | C and dis. |
| M 849 | 15.0 | 12.5 | 11.5 | 7.7:10 | C and und. |
| M 856 | 15.0 | 13.0 | 11.5 | 7.7:10 | C |
| 12296² | 15.3 | . . . . | 9.8 | 6.4:10 | C |
| 2569 | 15.6 | . . . . | 10.5 | 6.7:10 | C |
| 5323/13/29 | 16.0 | . . . . | 11.5 | 7.2:10 | C and P. dis. |
| 12302³ | 16.8 | . . . . | 15.4 | 9.2:10 | C and dis. |
| M 845 | 17.0 | 14.8 | 11.8 | 6.9:10 | C |
| 5323/12 | 17.0 | . . . . | 13.0 | 7.6:10 | C and und. |
| 12298⁴ | 18.2 | 15.6 | 12.5 | 6.9:10 | C and dis. |
| 5323/28 | 18.5 | . . . . | 13.8 | 7.4:10 | C and dis. |
| 12296⁵ | 19.3 | 16.5 | 13.0 | 6.7:10 | C and und. |
| 5323/23 | 19.6 | . . . . | 12.7 | 6.5:10 | C and dis. |
| 5323/3 | 19.6 | . . . . | 12.7 | 6.5:10 | C |
| M 863 | 20.0 | 16.0 | 13.5 | 6.7:10 | C and und. |
| M 839 | 22.0 est. | 19.0 est. | 15.5 | 7.0:10 | C and und. |
| M 843 | 22.0 est. | 17.4 | 17.6 | 8.0:10 | C and und. |
| 5323 | 22.0 est. | . . . . | 13.0 | 5.9:10 | C and P. dis. |
| M 874 | 23.5 est. | 21.7 | 16.6 | 7.1:10 | C and und. |
| 12296⁶ | 26.0 | . . . . | 16.2 | 6.2:10 | C and dis. |
| M 815 | 29.5 | 25.5 | 23.4 | 7.9:10 | C and und. |
| 5323/27 | 32.0 | . . . . | 28.5 | 8.9:10 | C and dis. |
| 12299⁷ | 43.5 | . . . . | 31.0 | 7.1:10 | C |
| ¹ Hypotype (Hall, 1884, pl. 5, fig. 9). | ⁵ Hypotype (Hall, 1884, pl. 5, fig. 12). |
| ² Hypotype (Hall, 1884, pl. 5, fig. 15). | ⁶ Hypotype (Hall, 1884, pl. 5, fig. 13). |
| ³ Hypotype (Hall, 1884, pl. 4, fig. 3). | ⁷ Hypotype (Hall, 1884, pl. 5, fig. 3). |
| ⁴ Holotype (Hall, C. E., 1877, fig.). |
Specimens M 794–M 881 are in the Geological Museum, Princeton University; specimens 12296–12306 are in the Walker Museum, University of Chicago; specimens 5323/1–29 are in the Museum of Comparative Zoology; and specimen 2569 is in the Peabody Museum, Yale University.
