NO. 3 CAMBRIAN TRILOBITES 245 



PAGE 



Crepicephalus tumidus Walcott 217 



Fig. 2. (Natural size.) Dorsal and side view of the type cranidium 

 of the species. The broken parts are restored in outline. 

 U. S. National Museum, Catalogue No. 61665. (Locality 

 120.) 



Crepicephalus comus Walcott 205 



Fig. 3. (X2.) Dorsal and side view of the type cranidium. U. S. 

 National Museum, Catalogue No. 61666. (Locality 120.) 

 ^a. (Natural size.) Pygidium. U. S. National Museum, Catalogue 

 No. 61667. (Locality 107.) 



The specimens represented by figs. 2 and 3 are from locality 120, 

 Upper Cambrian: Maryville limestone; north of Bays Mountain, 

 on Beaver Creek, Sevier County, 18 miles east-northeast of Knox- 

 ville, Knox County, Tennessee. 



Fig. 3a is from locality 107, Upper Cambrian : Maryville lime- 

 stone. Bull Run Ridge, northwest of PCnoxville, Knox County, 

 Tennessee. 



