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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
| DESCRIPTION OF PLATE 30 | ||||
| PAGE | ||||
| Bidentia difficilis Walcott | 174 | |||
| Fig. | 1. | (✕2.) Side view of a flattened specimen that has been injured by water percolating through the shale. The antennæ (a') are fairly well shown. U. S. National Museum, Catalogue No. 57701. | ||
| Emeraldella brocki Walcott | 203 | |||
| Fig. | 2. | (✕2.) A specimen flattened out so as to give a partial view of the head and body and a fine profile view of the abdomen and telson. e = eye, a' = antenna, mx' = maxillula, mx" = maxilla, thl = thoracic legs, i = alimentary canal. U. S. National Museum, Catalogue No. 57702. | ||
| Burgessia bella Walcott (see pl. 27) | 177 | |||
| Fig. | 3. | (✕3.) Profile view of a specimen with carapace crushed and distorted. U. S. National Museum, Catalogue No. 57679. | ||
| 4. | (✕3.) Side view of another specimen in which the carapace has been crowded off the body and out of shape. U. S. National Museum, Catalogue No. 57680. | |||
The specimens illustrated on Plate 30 are from locality (35k) Middle Cambrian: Burgess shale member 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.
