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SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
DESCRIPTION OF PLATE 7 | ||||
PAGE | ||||
Sidneyia inexpectans Walcott | 24 | |||
Fig. | 1. | Fragment of the ventral side of a small dorsal shield. ✕ 2. This shows the position of the leaf-like branchiae and branchial fringes. U. S. National Museum, Catalogue No. 57498. | ||
Beltina danai Walcott | 21 | |||
Fig. | 2. | Fragment of the cephalo-thorax, showing the posterior margin, a low, broad furrow, and in advance of that, irregular, transverse ridges and scattered tubercles. Natural size. U. S. National Museum, Catalogue No. 57501. | ||
2a. | An untouched photograph of the specimen represented by fig. 2. | |||
3. | An abdominal segment compressed in the siliceous shale that preserves more or less of the tuberculated surface. Natural size. U. S. National Museum, Catalogue No. 57502. | |||
The specimens represented by figs. 2 and 3 are from locality (14z) Algonkian: near the head of Johnson Creek on the Continental Divide west of Pincher Post Office, Alberta, Canada. | ||||
4. | A large abdominal segment preserving a portion of the original convexity and tuberculated surface. Natural size. U. S. National Museum, Catalogue No. 57503. | |||
The specimen represented by fig. 4 is from locality (14y) Algonkian: Altyn limestone; southeastern base of Appekuny mountain, opposite the inouth of Canyon Creek, in Swift Current Creek valley, at second gap from eastern end of mountain, near Altyn, Montana. |