Page:Walcott Cambrian Geology and Paleontology II.djvu/158

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102
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
DESCRIPTION OF PLATE 14
PAGE
Micromitra (Paterina) lucina Walcott 73
Fig. 1. Summit view of a ventral valve. ✕ 6. U. S. National Museum, Catalogue No. 57559.
Lingulella manchuriensis Walcott 74
Fig. 2. View of a ventral valve. ✕ 8. U. S. National Museum, Catalogue No. 57560.
2a. View of a partially exfoliated dorsal valve. ✕ 8. U. S. National Museum, Catalogue No. 57561.
Lingulella marcia Walcott 74
Fig. 3. View of an exfoliated ventral valve, showing vascular markings and cast of concentric lines of growth. ✕ 8. U. S. National Museum, Catalogue No. 57562.
3a. A partially exfoliated dorsal valve, showing vascular markings. ✕ 8. U. S. National Museum, Catalogue No. 57563.
Acrotreta venia Walcott 75
Fig. 4. Summit view of a ventral valve. ✕ 8. U. S. National Museum, Catalogue No. 57564.
4a. Anterior portion of a dorsal valve showing median ridge and central muscle scars. ✕ 8. U. S. National Museum, Catalogue No. 57565.
Orthotheca glabra Walcott 75
Fig. 5. A partially exfoliated specimen. ✕ 8. U. S. National Museum, Catalogue No. 57566.
5a. A minute, slender, broken specimen. ✕ 8. U. S. National Museum, Catalogue No. 57567.
Albertella pacifica Walcott 76
Fig. 6. Photograph of a fragmentary pygidium. ✕ 2. U. S. National Museum, Catalogue No. 57568.
Stephanocare ? monkei Walcott 77
Fig. 7. Pygidium doubtfully referred to this genus. ✕ 2. It is associated with Stephanocare sinensis (Bergeron). U. S. National Museum, Catalogue No. 57601.
Ptychoparia granosa Walcott 77
Fig. 8. Dorsal view of a cranidium. ✕ 3. U. S. National Museum, Catalogue No. 57602.