. Smithsonian miscellaneous collections . CRIPTION OF PLATE 40 PAGE Trilobite tracks and trails 174 Figs, i and 2. (Natural size.) Fig. 1 is from a photograph of a castmade of the natural cast represented by fig. 2 of a trail inwhich the protopodites have left their impressions; also onthe left side there are traces of the legs (endopodites).Fig. 2 reproduces the ventral side of the appendages mak-ing the impressions. U. S. National Museum, CatalogueNo. 66150. From locality 114b, Lower Ordovician: sandstone 1 mile( km.) north of LAnse Cove, Great Belle Isle, con-ception Bay, ,
. Smithsonian miscellaneous collections . CRIPTION OF PLATE 40 PAGE Trilobite tracks and trails 174 Figs, i and 2. (Natural size.) Fig. 1 is from a photograph of a castmade of the natural cast represented by fig. 2 of a trail inwhich the protopodites have left their impressions; also onthe left side there are traces of the legs (endopodites).Fig. 2 reproduces the ventral side of the appendages mak-ing the impressions. U. S. National Museum, CatalogueNo. 66150. From locality 114b, Lower Ordovician: sandstone 1 mile( km.) north of LAnse Cove, Great Belle Isle, con-ception Bay, , 4, and 5. (Natural size.) Figs. 3 and 4 represent portions of thenatural cast of a trail which is unlike any of the othertrails illustrated. The natural trail is shown by fig. 5. U. Museum, Catalogue No. 66151. From locality 36611, Upper Cambrian: Lower Lingulaflags at Portmadoc, Merionethshire, North Wales. This track is described as Crusiana semiplicata by Salter. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 67, NO. 4, PL. 40.
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
