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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
| DESCRIPTION OF PLATE 3 | ||||
| PAGE | ||||
| Sidneyia inexpectans Walcott | 24 | |||
| Fig. | 1. | A portion of a branchial leaf or lamella showing something of the structure. ✕ 3. U. S. National Museum, Catalogue No. 57486. | ||
| 2. | Enlargement (✕ 2) of the posterior segments of a specimen showing what appears to have been the contents of the alimentary canal. U. S. National Museum, Catalogue No. 57489. | |||
| 3. | Enlargement (✕ 2) of the caudal fin of the specimen represented by fig. 2, pl. 5. | |||
| 4. | Enlargement (✕ 2) of the caudal fin of the specimen represented by fig. 1, pl. 2. | |||
