Smithsonian miscellaneous collections . don Creek, Powell County, Montana. Bathyuriscus belus Walcott 339 Fig. 2. (X 2.) Cranidium that has lost much of its convexity by beingcrushed in the shale. U. S. National Museum, CatalogueNo. (X2.) A cranidium preserving the postero-lateral limbs. National Museum, Catalogue No. (X4.) A small associated pygidium. U. S. National Museum, Catalogue No. (Natural size.) Matrix of a large pygidium. U. S. National Museum, Catalogue No. (X4-) Associated hypostoma on rock with specimen repre-sented by fig. 2b. U. S. Na
Smithsonian miscellaneous collections . don Creek, Powell County, Montana. Bathyuriscus belus Walcott 339 Fig. 2. (X 2.) Cranidium that has lost much of its convexity by beingcrushed in the shale. U. S. National Museum, CatalogueNo. (X2.) A cranidium preserving the postero-lateral limbs. National Museum, Catalogue No. (X4.) A small associated pygidium. U. S. National Museum, Catalogue No. (Natural size.) Matrix of a large pygidium. U. S. National Museum, Catalogue No. (X4-) Associated hypostoma on rock with specimen repre-sented by fig. 2b. U. S. National Museum, Catalogue specimens represented by figs. 2, 2a-d, are more or less flat-tened in a fine arenaceo-argillaceous shale at locality 4w, Lower ?Cambrian: Youngs Creek, Powell County, Montana. Dolichomctopus suecicus Angelin 372 Figs. 3, 3. (Natural size.) Dorsal and side views of a cranidium re-taining a portion of the outer test. U. S. National Mu-seum, Catalogue No. 62682. i MISCELLANEOUS COL VOL 64, NO. 5. CAMBRIAN TRILOBITES NO. 5 CAMBRIAN TRILOBITES 423 Dolichometopus suecicus Angelin—Continued. page 3a. (Natural size.) Dorsal view of a cranidium from which theouter surface has been exfoliated. U. S. National Mu-seum, Catalogue No. ^- (X3-) Dorsal view of a pygidium associated with the cra-nidium of this species. U. S. National Museum, CatalogueNo. 62684. The specimens represented by figs. 3, 3, 3a-b, are from locality8w, Middle Cambrian: Limestones of Paradoxidcs forchhammcrizone at Andrarum, Sweden. 4, 4a. (Natural size.) Reproduction of figures by Matthew,which were drawn from Angelins type specimen now inthe Museum at Stockholm. (Trans. Roy. Soc. Canada. Vol. 3, 1897, Sec. 4, pi. 3, figs. Ja, yb.) 424 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 DESCRIPTION OF PLATE 51 PAGE Dolichometopus tontoensis Walcott 373 Fig. I. (Natural size.) A nearly complete dorsal shield, showing en-larged fifth segment. U. S. National Museum, C
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