Smithsonian miscellaneous collections . e cheek associated with this species.(Locality i6d.) U. S. National Museum, Catalogue The specimens represented by figs. 2, 2a-b are from the siliceousnodules of locality 89X. These occur in the Conasauga shales ofthe Middle Cambrian, Coosa Valley, Livingston, Floyd County,Georgia. Figs. 3, 3a-b are of specimens from the shale in which the nodulesoccur, (gox, 112, and i6d) Coosa Valley, Cherokee County, Ala-bama. Acrocephalites haynesi Walcott 179 Figs. 4, 40. (X 3-) Dorsal view and side outline of a small cranidiumon which the tubercle in fron
Smithsonian miscellaneous collections . e cheek associated with this species.(Locality i6d.) U. S. National Museum, Catalogue The specimens represented by figs. 2, 2a-b are from the siliceousnodules of locality 89X. These occur in the Conasauga shales ofthe Middle Cambrian, Coosa Valley, Livingston, Floyd County,Georgia. Figs. 3, 3a-b are of specimens from the shale in which the nodulesoccur, (gox, 112, and i6d) Coosa Valley, Cherokee County, Ala-bama. Acrocephalites haynesi Walcott 179 Figs. 4, 40. (X 3-) Dorsal view and side outline of a small cranidiumon which the tubercle in front of the glabella is onlyslightly ^- (X3-) Dorsal view of two cranidia illustrating variation infrontal tubercle. The specimens illustrated by figs. 4, 4a, and 4b are from the UpperCambrian, Meagher limestone on Pole Creek, Montana. The typespecimen is at the Museum of Comparative Zoology, Cambridge,Massachusetts. Plastotypes, U. S. National Museum, Catalogue No. 61562, 61563. SMITHSONIAN MISCELLANEOUS COLLECTIONS 94, NO. 3,. ACROCEPHALITES NO. 3 CAMBRIAN TRILOBITES 23I PAGE Acrocephalites multisegmentus Walcott 180 Fig. 5. (X4-) Dorsal view of cranidium with short occipital spinebroken off. U. S. National Museum, Catalogue No. (X4.) Dorsal view of a nearly entire dorsal shield. U. Museum, Catalogue No. 61565. The specimens illustrated by figs. 5 and 5a are from localitiesson, 30 o, the Upper Cambrian: Weeks formation; 2 miles () south of Marjum Pass, Millard County, Utah. Acrocephalites tutus Walcott 181 Fig. 6. (X3-) Cranidia and free cheeks as they occur on surface ofshale. U. S. National Museum, Catalogue No. (X4-) Enlargement of the anterior part of a cranidium toillustrate frontal limb and rim, and granulated S. National Museum, Catalogue No. 61567. The specimens illustrated are from locality 141, Middle Cam-brian : the Conasauga shale near Cave Spring, Floyd County,Georgia. 232 SMITHSONIAN MISCELLANEOUS COLLECTIO
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