244 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



DESCRIPTION OF PLATE 31 



PAGE 



Crepicephalus thoosa W-alcott 214 



Fig. I. -(Natural size.) Dorsal and side view of type specimen of the 

 cranidium. U. S. National Museum, Catalogue No. 61654. 

 From (125a) Maryville limestone, Big Creek, northeast of 

 Rogersville, Hawkins County, Tennessee. 



\a, la'. (Natural size.) Top view and profile of a large broken 

 cranidium. The broken parts restored in outline. U. S. 

 National Museum, Catalogue No. 61655. (Locality 119.) 

 lb. (X2.) Free cheek associated with the cranidia of this spe- 

 cies. U. S. National Museum, Catalogue No. 61656. 

 (Locality 107.) 

 'i^c. (X3-) Small cranidium enlarged to illustrate pustulose sur- 

 face and form. Broken portions restored in outline from 

 fig. I. U. S. National Museum, Catalogue No. 61657. 

 From (119a) Honaker (= Maryville) limestone, east of Green- 

 dale, Washington County, Virginia. 

 id. (X2.) Hypostoma associated with this species at locality 119. 

 U. S. National Museum, Catalogue No. 61658. 

 The specimens represented by figs, la and id are from Upper 

 Cambrian, (119) Maryville limestone; beneath Nolichucky shale. 

 Cub Creek, southeast of Morristown, Hamblen County, Tennessee. 



le. (X2.) Hypostoma associated with this species at locality 



107. U. S. National Museum, Catalogue No. 61659. 

 if. (Natural size.) Dorsal view of pygidium and side outline 

 associated with cranidia of this species at locality 107. 

 U. S. National Museum, Catalogue No. 61660. 

 The specimens represented by figs, ib, le, and if are from 

 Maryville limestone, (107) Bull Run Ridge, northwest of Knox- 

 ville, Knox County, Tennessee. 



i^. (X 2.) Pygidium associated with this species at locality 145a. 



U. S. National Museum, Catalogue No. 61661. 

 ih. (X6.) Enlargement of surface to illustrate granulation. 

 !*'• (X3-) Broken thoracic segment, to illustrate granulation. 



U. S. National Museum, Catalogue No. 61662. 



The specimens represented by figs, ig and li are from Upper 

 Cambrian, (145a) Conasauga shale; upper part of shale beneath 

 Knox dolomite; east of Gaylesville, Cherokee County, Alabama. 

 i;. (X2.) Small pygidium weathered out on limestone. U. S. 



National Museum, Catalogue No, 61663. 

 ik. (Natural size.) Large pygidium associated with specimen 



represented by fig. ij. U. S. National Museum, Catalogue 



No. 61664. 



The specimens represented by figs, i; and ik are from locality 91, 

 Upper Cambrian : Conasauga formation ; Cedar Bluff, Cherokee 

 County, Alabama. 



