Page:Walcott Cambrian Geology and Paleontology II.djvu/72

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38
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
DESCRIPTION OF PLATE 6
PAGE
Neolenus serratus (Rominger) 27
Fig. 1. Branchial fringes on the exopodites of the left side of the interior of a compressed dorsal test. ✕ 1.5. Other specimens show the endopodites as slender, jointed legs. The specimen photographed was associated with Sidneyia inexpectans. U. S. National Museum, Catalogue No. 57500.
2. A cephalic endopodite with lamellated branchial fringe. ✕ 3. This occurs on the opposite side of the specimen represented in part by fig. 1.
Sidneyia inexpectans Walcott 24
Fig. 3. Photograph by reflected light of a broken specimen of the dorsal shield through which may be seen traces of the branchial lamellae and fringes and some of the appendages of the cephalo-thorax. Natural size. U. S. National Museum, Catalogue No. 57497.