Smithsonian miscellaneous collections . ral specimens ofthe cranidium. This figure is the same as that published in1887, American Jour. Sci., Vol. 34, plate i, fig. 3; idem, 1891,Tenth Ann. Kept., U. S. Geol. Surv., plate 98, fig. 4-4&. (X6.) A minute cranidium. U. S. National Museum, Cata-logue No. 17454^-The specimens represented by figs. 4, 4b are from the Lower Cam-brian limestone of localities 38a and 43a, Washington County, NewYork. Corynexochus stcphoicnsis (Walcott) 324 Figs. 5, 5a. (X2.) Nearly entire dorsal shield with the free cheeksrestored from other specimens and matrix of same.
Smithsonian miscellaneous collections . ral specimens ofthe cranidium. This figure is the same as that published in1887, American Jour. Sci., Vol. 34, plate i, fig. 3; idem, 1891,Tenth Ann. Kept., U. S. Geol. Surv., plate 98, fig. 4-4&. (X6.) A minute cranidium. U. S. National Museum, Cata-logue No. 17454^-The specimens represented by figs. 4, 4b are from the Lower Cam-brian limestone of localities 38a and 43a, Washington County, NewYork. Corynexochus stcphoicnsis (Walcott) 324 Figs. 5, 5a. (X2.) Nearly entire dorsal shield with the free cheeksrestored from other specimens and matrix of same. U. Museum, Catalogue No. locality 14s, Middle Cambrian: Stephen formation; MountStephen, British Columbia, Canada. This is the same figure as that of pi. 3, fig. 4 (Canadian AlpineJour., Vol. I, 1908) and fig. 8, pi. 36 (Smithsonian Misc. Coll., , 1915). It is reproduced here in order that direct comparison maybe made with other species of Corynexochus. SMITHSONIAN MISCELLANEOUS COLLECTIONS NO, 6, PL. 65. CORYNEXOCHUS NO. 5 CAMBRIAN TRILOBITES 433 Corynexochus stephcncnsis (Walcott)—Continued. page Sb. (X8.) A minute cranidium tentatively referred to this S. National Museum, Catalogue No. 62717. From locality 35k, Middle Cambrian: Burgess shale; i mile () northeast of Burgess Pass, British Columbia, Canada. 5r. (X2.) Matrix of cranidium. U. S. National Museum, Cata-logue No. locality X4S, Middle Cambrian : Stephen formation; MountStephen, British Columbia, Canada. Corynexochus minor (Walcott) 3^9 Fig. 6. (X 6.) Group of specimens on a fragment of shale. U. Museum, Catalogue No. (X8.) Form of hypostoma abundantly associated with this species. U. S. National Museum, Catalogue No. (X 8.) Small dorsal shield with three thoracic segments. U. Museum, Catalogue No. 61730. The specimens represented by figs. 6, 6b were illustrated by figs. 7,yb, plate 36, Smithsonian Misc. Coll., Vol. 64,
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