Plate 53: Trilobita (Callavia and Wanneria) to face page 324 Callavia eucharis (Walcott) = Nevadella eucharis (Walcott, 1913) Wanneria occidens (Walcott) = Mummaspis occidens (Walcott, 1913) Callavia perfecta (Walcott) = Nevadella perfecta (Walcott, 1913) Callavia perfecta (Walcott) = Nevadella perfecta (Walcott, 1913) Callavia perfecta (Walcott) = Nevadella perfecta (Walcott, 1913) Original historic description: DESCRIPTION OF PLATE 53 PAGE Callavia eucharis Walcott 315 Fig. 1. (× 2.) Type specimen of the species. (Locality 61k.) U. S. National Museum, Catalogue No. 60079. Wanneria occid
Plate 53: Trilobita (Callavia and Wanneria) to face page 324 Callavia eucharis (Walcott) = Nevadella eucharis (Walcott, 1913) Wanneria occidens (Walcott) = Mummaspis occidens (Walcott, 1913) Callavia perfecta (Walcott) = Nevadella perfecta (Walcott, 1913) Callavia perfecta (Walcott) = Nevadella perfecta (Walcott, 1913) Callavia perfecta (Walcott) = Nevadella perfecta (Walcott, 1913) Original historic description: DESCRIPTION OF PLATE 53 PAGE Callavia eucharis Walcott 315 Fig. 1. (× 2.) Type specimen of the species. (Locality 61k.) U. S. National Museum, Catalogue No. 60079. Wanneria occidens Walcott 314 Fig. 2. (Natural size.) Type specimen of the cephalon of the species. (Locality 61k.) U. S. National Museum, Catalogue No. 60080. Callavia perfecta Walcott 315 Fig. 3. (× 2.) Type specimen of the species. (Locality 61k.) U. S. National Museum, Catalogue No. 60081. 4. (Natural size.) Specimens of the cephalon found in a parting of the shale. (Locality 61k.) U. S. National Museum, Catalogue No. 60082. 5. (Natural size.) A large cephalon flattened in the shale. (Locality 61k.) U. S. National Museum, Catalogue No. 60083. The specimens represented here by figs. 1-5 are from locality 61k. Lower Cambrian: Mahto formation; dark, hard siliceous shale, northeast base of Mumm Peak above Mural Glacier on the west side of Hitka Pass, 6 miles ( km.) in a direct line north of summit of Robson Peak and northwest of Yellowhead Pass, in western Alberta, Canada. 1913/14 69 Walcott Cambrian Geology and Paleontology II plate 53
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