246 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



DESCRIPTION OF PLATE 32 



PAGE 



Crepicephalus dis Walcott 207 



Fig. I. (X I-S-) Dorsal view of cranidium. U. S. National Museum, 

 Catalogue No. 61668. 

 la. (Natural size.) Associated free cheek. U. S. National 



Museum, Catalogue No. 61669. 

 lb, lb'. (X2.) Dorsal and side views of a slightly distorted 

 cranidium. U. S. National Museum, Catalogue No. 61670. 

 ic. (Natural size.) Pygidium associated with specimen repre- 

 sented by figs. I, la-b. U. S. National Museum, Catalogue 

 No. 61671. 

 The specimens represented by figs, i, la-c are from localities 

 14V, 3on, and 30 0, Upper Cambrian : Weeks formation ; House 

 Range, Utah. 



Crepicephalus camiro Walcott 205 



Figs. 2, 2'. (X2.) Dorsal view and side outline of type specimen of 

 cranidium. U. S. National Museum, Catalogue No. 61672. 

 2". (Natural size.) This is the same specimen as fig. 2. 

 2a, 2a'. (X2.) Dorsal view and side outline of a pygidium asso- 

 ciated with this species. U. S. National Museum, Cata- 

 logue No. 61673. 

 The specimens represented by figs. 2 and 2a are from locality 

 120, Upper Cambrian: Maryville limestone; 18 miles east-north- 

 east of Knoxville, Tennessee. 



Crepicephalus coosensis Walcott 206 



Fig. 3. (Natural size.) Restored figure of dorsal shield based on a 

 large specimen preserving the cranidium, thorax, and py- 

 gidium in an imperfect condition. U. S. National Museum, 

 Catalogue No. 61674. 



3a, 2<^'. (Natural size.) Dorsal view and side outline of a large 

 cranidium. U. S. National Museum, Catalogue No. 61675. 



3&. (Natural size.) Dorsal view of large pygidium. U. S. 

 National Museum, Catalogue No. 61676. 



3c, 3c'. (Natural size.) Dorsal view and side outline of a medium- 

 sized cranidium. The broken parts are restored in outline. 

 U. S. National Museum, Catalogue No. 61677. 



3d, 3d'. (Natural size.) Dorsal view and side outline of a cra- 

 nidium, showing palpebral lobe and occipital ring. U. S. 

 National Museum, Catalogue No. 61678. 



2e. (Natural size.) Interior view of a pygidium showing portions 

 of the doublure. U. S. National Museum, Catalogue No. 

 61679. 



3/. (X2.) Cranidium and left free cheek. U. S. National Mu- 

 seum, Catalogue No. 61680. 



The specimens represented by figs. 3, T,a-c are from locality gox, 

 Middle Cambrian : lower part of Conasauga formation ; east of 

 Center, Cherokee County, Alabama. 



