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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
| DESCRIPTION OF PLATE 11 | ||||
| cr. Central ring. rc. Radial canals. s. Stomach. | ||||
| PAGE | ||||
| Eldonia ludwigi Walcott (see also text fig. 5 and pls. 8-10 and 12) | 46 | |||
| Fig. | 1. | An individual flattened in the shale, showing the lobate character of the umbrella. ✕ 2. U. S. National Museum, Catalogue No. 57549. | ||
| 2. | Another specimen with the radiating canals very closely defining the lobes. ✕ 2. U. S. National Museum, Catalogue No. 57550. | |||
| 3. | A fragmentary specimen that shows the radial canals (rc) and central ring (cr) with unusual clearness. ✕ 2. U. S. National Museum, Catalogue No. 57551. | |||
All of the specimens illustrated on this plate are from locality (35k) Middle Cambrian; dark siliceous shales in the Burgess shale of the Stephen formation on the west slope of the ridge between Mount Field and Wapta Peak, one mile (1.6 km.) northeast of Burgess Pass, above Field, British Columbia.
