Smithsonian miscellaneous collections . erally compressed cranidium. U. S. National Museum, Catalogue No. 62734. 2a. (X3-) Side view of a convex cranidium. L^^. S. National Museum, Catalogue No. (X8.) Ridged surface of a glabella. U. S. National Museum,Catalogue No. 62736. The specimens represented by figs. 2, 2a-& are from limestone atlocality 20, Lower Cambrian: Bic Harbor, Quebec, Canada. 3. 3- (X2.) Dorsal and side view of a large cranidium. U. S. National Museum, Catalogue No. 6272,7-30. (X 3-) Free cheek with outline of spine restored from another specimen. U. S. National Museu
Smithsonian miscellaneous collections . erally compressed cranidium. U. S. National Museum, Catalogue No. 62734. 2a. (X3-) Side view of a convex cranidium. L^^. S. National Museum, Catalogue No. (X8.) Ridged surface of a glabella. U. S. National Museum,Catalogue No. 62736. The specimens represented by figs. 2, 2a-& are from limestone atlocality 20, Lower Cambrian: Bic Harbor, Quebec, Canada. 3. 3- (X2.) Dorsal and side view of a large cranidium. U. S. National Museum, Catalogue No. 6272,7-30. (X 3-) Free cheek with outline of spine restored from another specimen. U. S. National Museum, Catalogue No. ,b, 36, 2,b. (X 3) Dorsal, side and front views of a very perfect and convex cranidium. U. S. National Museum, Catalogue No. , zc- (X 3-) Dorsal and side view of a cranidium shortened by distortion. U. S. National Museum, Catalogue No. , 3d. (X2.) Dorsal and side view of a large pygidium. U. S. National Museum, Catalogue No. 62741. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64. NO. 5. PL. 56. CORYNEXOCHUS NO. 5 CAMBRIAN TRILOBITES 435 Corynexochus bubaris Walcott—Continued. page 2e. (X 2.) Pen and ink sketch of tive thoracic segments and pygi- dium. The original specimen has crumbled on the surface so that it cannot be photographed. U. S. National Museum, Catalogue No. (X4-) Hypostoma. U. S. National Museum, Catalogue No. 62743-The specimens represented by figs. 3, 2,a-g are from a leachedcalcareous sandstone at locality 49, Lower Cambrian: near Emigs-ville, York County, Pennsylvania. 43^ SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 DESCRIPTION OF PLATE 57 PAGE Corynexochus {Bonnia) parvulus (Billings) (see pi. 64, fig. 6) 328 Fig. I. (X 10.) Enlargement of cranidium shown by ib, to , lb. (X 3-) Dorsal and side views of a finely preserved cranid-ium. U. S. National Museum, Catalogue No. , \c. (X3-) Dorsal and side views of a pygidium. U. S. Na-tional Museum, Catalogue No. 62745. The specimens repr
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