Smithsonian miscellaneous collections . nd drawn froman imperfect specimen with damaged portions restoredfrom associated specimens. U. S. National Museum, Cata-logue No. 61601. 2a (X3) and 26 (XS)- Cranidia illustrating form. Fig. 26 is ayounger stage of growth. U. S. National Museum, Cata-logue Nos. 61602 and 61603. 2c. (X4-) Ventral side of a distorted cephalon. U. S. NationalMuseum, Catalogue No. 61604. 2d. (X4-) Ventral side of a small cranidium. U. S. NationalMuseum, Catalogue No. 61605. 2e. (X8.) A small pygidium associated with specimens repre-sented by figs. 2a-b. U. S. National Museum
Smithsonian miscellaneous collections . nd drawn froman imperfect specimen with damaged portions restoredfrom associated specimens. U. S. National Museum, Cata-logue No. 61601. 2a (X3) and 26 (XS)- Cranidia illustrating form. Fig. 26 is ayounger stage of growth. U. S. National Museum, Cata-logue Nos. 61602 and 61603. 2c. (X4-) Ventral side of a distorted cephalon. U. S. NationalMuseum, Catalogue No. 61604. 2d. (X4-) Ventral side of a small cranidium. U. S. NationalMuseum, Catalogue No. 61605. 2e. (X8.) A small pygidium associated with specimens repre-sented by figs. 2a-b. U. S. National Museum, CatalogueNo. 61606. 2/. (X2.) Thoracic median spines. U. S. National Museum,Catalogue No. 61607. 2g. (X3-) Cranidium and a long thoracic median spine. U. Museum, Catalogue No. 61608. All the specimens illustrated are compressed in the Upper Cam-brian fine Conasauga shale as they occur at (90a) Cedar Bluffand (92X) Yanceys Bend, on the Coosa River, Cherokee County,Alabama. HSONIAN MISCELLANEOUS COLLECTIONS 64. NO. 3, PL. 27. NO. 3 CAMBRIAN TRILOBITES 237 PAGE Norwoodia simplex Walcott 171 Fig. 3. (X4-) An entire, slightly weathered specimen of the dorsalshield. U. S. National Museum, Catalogue No. 61609.:^a. (X 6.) Interior of a compressed dorsal shield. U. S. National Museum, Catalogue No. (X6.) An imperfect, small cranidium preserving somethingof its original convexity. U. S. National Museum, Cata-logue No. 61611. All the specimens illustrated are from localities 90a and 91,Upper Cambrian: Conasauga shale; at Cedar Bluff, Coosa River,Cherokee County, Alabama. 238 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 DESCRIPTION OF PLATE 28 PAGE Norwoodia ponderosa Walcott 171 Fig. I. (X6.) Matrix of a craiiidium compressed in fine shale. Theoccipital spine is restored. U. S. National Museum, Cata-logue No. (X 5.) Cranidium varying in form from fig. I. U. S. National Museum, Catalogue No. (X6.) Minute pygidium associated with this species. U.
Size: 1268px × 1972px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookidsmiths, booksubjectscience
