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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
| DESCRIPTION OF PLATE 28 | ||||
| PAGE | ||||
| Opabinia regalis Walcott (see pl. 27, fig. 6) | 167 | |||
| Fig. | 1. | (✕2.) Dorsal view of a male specimen, flattened in the shale, showing fp = frontal appendage, e = eye, ths = thoracic somites, i = intestine, ab = abdominal segment. U. S. National Museum, Catalogue No. 57684. | ||
| Nathorstia transitans Walcott | 194 | |||
| Fig. | 2. | (✕2.) Dorsal view of the type specimen of the species. It is flattened and slightly distorted with the left side more or less crushed in towards the center. a' = antenna, e = eye, gs = genal spine, pl = pleura of thoracic segments, m = 4 joints of leg (mandible?), ta = central or thoracic axis, i = intestine, thl = thoracic legs, cr = caudal rami. U. S. National Museum, Catalogue No. 57685. | ||
| Naraoia compacta Walcott | 175 | |||
| Fig. | 3. | (✕2.) Side view of cephalo-thoracic carapace with traces of appendages showing through it. U. S. National Museum, Catalogue No. 57686. | ||
| 4. | (✕2.) Dorsal view of specimen described. U. S. National Museum, Catalogue No. 57687. | |||
All of the specimens illustrated on Plate 28 are from locality (35k) Middle Cambrian: Burgess shale member of the Stephen formation, on the west slope of the ridge betwen Mount Field and Wapta Peak, one mile (1.6 km.) northeast of Burgess Pass, above Field, British Columbia.
